Answer:
Explanation:
Given that:
A dihybrid cross SS tt × ss TT is used to make an F1 generation
where;
S = dominant
T and t exhibit incomplete dominance.
According to Mendelian's Law of Independent Assortment.
The cross between SS tt × ss TT will be as follows:
If self crossing occurs first, the following traits will be used for the F1 cross
S S
t St St
t St St
s s
T sT sT
T sT sT
St St St St
sT SstT SstT SstT SstT
sT SstT SstT SstT SstT
sT SstT SstT SstT SstT
sT SstT SstT SstT SstT
Thus; the F1 generation produce offsprings that are all heterozygous SstT
For the F2 generation now;
We have
SsTt × SsTt
S s
T ST sT
t St st
ST St sT st
ST SSTT SSTt SsTT SstT
St SSTt SStt sSTt sStt
sT SsTT SstT sSTT sstT
st SsTt Sstt ssTt sstt
From the above F2 generation; we have the following offspring.
SSTT ---- 3 = 3/16 = 0.1875 = 18.75 %
SStT ----- 6 = 6/16 = 0.375 = 37.5%
Sstt ------ 3 = 3/16 = 0.1875 = 18.75 %
ssTT ------ 1 = 1/16 = 0.0625 = 6.25%
ssTt ----- 2 = 2/16 = 0.125 = 12.5%
sstt ----- 1 = 1/16 = 0.0625 = 6.25%
The branch of science that deals with genes and inheritance are called genetics. There are two types of an allele in the gene pair, one allele is called recessive and the other is dominant.
The correct answer to the question is mentioned below.
Dihybrid crossA cross in which where two-character are crossed.According to the question, the two-character T and S are crossed together to produced the offspring.In the cross, the dominant character has a ratio is 3/4 and the recessive character has 1/4.
The ratio of the given character is as follows:-
From the above F2 generation; we have the following offspring.
SSTT ---- 3 = 3/16 = 0.1875 = 18.75 %SStT ----- 6 = 6/16 = 0.375 = 37.5%Sstt ------ 3 = 3/16 = 0.1875 = 18.75 %ssTT ------ 1 = 1/16 = 0.0625 = 6.25%ssTt ----- 2 = 2/16 = 0.125 = 12.5%sstt ----- 1 = 1/16 = 0.0625 = 6.25%Hence, the correct answer is mentioned above.
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g Transcription: Transcription Is the process of making an RNA copy of a DNA gene. Is the process of making a protein from a DNA gene. Is the process of making a protein from a mRNA strand. Only occurs in eukaryotes.
Answer:
Transcription Is the process of making an RNA copy of a DNA gene
Explanation:
Transcription is the cellular process for which the information contained in one DNA strand of the double helix is used as template to synthesize an RNA molecule. Transcription uses an RNA polymerase (RNA Pol) to synthesize diverse types of RNA species including, for instance, mRNA, transference RNA (tRNA), ribosomal RNA (rRNA), non-coding RNAs (ncRNAs), etc. Moreover, different Transcription Factors (TFs) are also recruited during the initiation of the transcription which bind to the DNA strand in particular elements named promoters. The formation of the initiation complex (i.e., RNA Pol + TFs) is known as the initiation of transcription, which is subsequently followed by the elongation and, finally, the termination of this process.
A species of spruce tree occupies the same niche at the mouth of a river that a species of pine tree occupies further upstream. One year, several pinecones fall into the river and are carried to the mouth, where they take root and grow amongst the spruce trees. What will be the most likely result of this occurrence
Answer:
The correct option is: "Either the pine trees or the spruce trees will eventually evolve into a new species."
Explanation:
There will be a competition between spruce trees and pine trees for nutrition and other resources from the environment to grow and spread since they are now occupying the same niche. Overtime, one specie will outlive the other by evolving into a specie that gives it an advantage over the other.
Answer: bears
Explanation: it’s the answer
How is NADPH different from NADP+?. A. It has lost one electron. B. It has gained one electron. C. It has lost one proton. D. It has gained one proton
Answer:
A. It has lost one electron
Explanation:
Since the H has been replaced by a +, this means that the Hydrogen is now a positive ion. For this to happen, it would have to lose an electron.
Gaining one would make it negative, and protons cannot be gained or lost under normal circumstances.
Answer:
B. It has gained one electron.
Explanation:
Hope it helps .
How can a forensic palynologist help a crime investigation?
Answer: A forensic palynologist can help a crime investigation because they can examine the pollen in the victim and compare it with the pollen from the suspects by using a comparison microscope to tell if it's a match.
Answer: Well, forensics is the study of the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation. So they have an important role in the judicial system because they study criminal reports and files, Identify and classify crime scene evidence through scientific analysis, and then they have to explore possible links between suspects and criminal activity using the results of chemical and physical analyses. So in a crime scene, they might examine the details that they might notice, like the position of the victim or the objects surrounding the scene, test and analyze them, and then follow the leads they get from that.
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Choose one of the offspring from the image and decide on your own the genotype of his or her partner then draw a pedigree chart showing the possible genotypes of their offspring make sure your Pedegree chart clearly shows that individuals are homozygous and heterozygous For the hemophilia gene they charge to show all possibilities for the offspring
Answer:Plato answer
Explanation:
A pedigree chart showing the possible genotypes of their offspring is that in which it shows about the affected male and the purebred female.
What are Pedegree chart ?A pedigree indicates relationships among own circle of relatives participants and shows which people have sure genetic pathogenic , traits, and sicknesses inside a own circle of relatives in addition to important status. A pedigree may be used to decide ailment inheritance styles inside a own circle of relatives.
So in this case we will discuss that how the purebred female and the affected male are the genotypes.
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What are cell membranes composed of? Why is it important for the cell membrane to be semi-permeable?
Answer:
With few exceptions, cellular membranes — including plasma membranes and internal membranes — are made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains. Glycerol is a three-carbon molecule that functions as the backbone of these membrane lipids
Cell membranes are semipermeable, which means molecules can move through them. This is pretty important for cells to survive. Osmosis is where solvent molecules (usually water) move from one side of a cell membrane to the other. This happens because the concentration of a solute is higher on one side.
Explanation:
Why do you think these groups have a high risk of osteoporosis
Answer:
lack or low calcium level
Explanation:
when a person has a low calcium intake, these people are susceptible to having osteoporosis as their bodies would be lacking of much needed calcium.
Low calcium intake increases osteoporosis risk. Lifelong calcium deficiency causes osteoporosis. Low calcium consumption causes bone loss, early bone loss, and fractures.
What is osteoporosis?Osteoporosis is a disorder that causes bones to become brittle and more prone to breaking, which increases the risk of fractures. It manifests itself gradually over the course of several years, but the condition is typically not recognized as a problem until a bone breaks as a result of a fall or a sudden impact. A broken wrist is the type of injury that occurs most frequently in people who have osteoporosis.
People who consume inadequate amounts of calcium are at increased risk for developing osteoporosis. The deficiency of calcium over a lifetime is one of the factors that can contribute to the development of osteoporosis. A diet deficient in calcium has been linked to decreased bone density, an accelerated rate of bone loss, and an increased risk of fractures.
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Complete this sentence. The CNS communicates with the body proper through ________. View Available Hint(s) Complete this sentence. The CNS communicates with the body proper through ________. some cranial nerves, some spinal nerves, and some additional nerves that were mentioned but not discussed in the tutorial the spinal nerves but not specifically through the cranial nerves the cranial nerves but not specifically through the spinal nerves some (but not all) of the cranial nerves and some (but not all) of the spinal nerves the cranial nerves and the spinal nerves
Answer:
The correct answer is - The cranial nerves and the spinal nerves.
Explanation:
The central nervous system or CNS includes the brain and the spinal cord of the nervous system where it takes sensory information, integrates, and responds accordingly. The spinal cord acts as a conduit for signals between the brain and the rest of the body.
Spinal nerves and crania; both play an essential role in taking sensory information and respond accordingly. Spinal nerves are nerves that help in sending motor, sensory, and autonomic signals between the CNS and the body. The cranial nerves supply information to the CNS and then from the CNS to the body.
Thus, the correct answer is - The cranial nerves and the spinal nerves.
What type of enzyme can activate another enzyme by adding a phosphate from ATP?
Answer:
Here my answer goes.......
Explanation:
In biochemistry, a kinase is an enzyme that catalyzes the transfer of phosphate groups from high-energy, phosphate-donating molecules to specific substrates. This process is known as phosphorylation, where the substrate gains a phosphate group and the high-energy ATP molecule donates a phosphate group.
What is a bionomial nomenclature
[tex] [/tex]
In taxonomy, binomial nomenclature, also called binominal nomenclature or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages.
-XxItzAdiXxWhich correctly lists the three weather factors that are indicators of climate change?
sunsets, wind patterns, clouds
ocean currents, ice cores, temperature
temperature, wind patterns, ice cores
wind patterns, temperature, ocean currents
Answer: D) wind patterns, temperature, ocean currents
Explanation: Ed2020
The list of weather factors that are indicators of climate change are wind patterns, temperature, ocean currents.
What is climate?Climate is the atmospheric weather conditions that exist in a place at a particular time which affect the existence of living things.
Therefore, The list of weather factors that are indicators of climate change are wind patterns, temperature, ocean currents
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Explain what the impact of mutations in myosin that disrupt ATP binding would have on the power stroke during muscle contraction. and hydrolysis Skeletal muscle arrangement, ATP binding and correct muscle contractions
Answer:
These cells will be atrophied because muscle contractions can't occur.
Explanation:
In muscle cells, ATP binding causes a conformational change in the structure of myosin, thereby these filaments move to a high-energy configuration. The muscle contraction is caused when this high energy state is amplified in the actin filaments that bind to myosin, in a process dependent on the ATP hydrolysis. The myosin-actin cycle is repeated by binding another ATP molecule on the myosin head, producing the contraction of muscle cells.
Cell membranes are made of
Answer:
According to research ,
cellular membranes (e.g plasma membranes internal membranes) :are made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains.
Glycerol is a three-carbon molecule that functions as the backbone of these membrane lipids.
Explanation:
Which of the following statements is true?A. An isolated system cannot exchange either matter or energy with its surroundings. B. Organisms are open systems when they are out of their habitats. C. Organisms are isolated systems because they have their own machineries in the cells to supply all the matter and energy they need. D. Open systems are called as such because they do not absorb energy, but just openly release the energy to their surroundings.
Answer:
A
Explanation:
An isolated system can NOT exchange energy or matter with it's surroundings. This is why it is isolated.
Is there a difference between the theoretical probability of a child being affected by an autosomal recessive disease carried by both of her parents (as in Question 1), and the fraction of affected children you observe when generating a random family with four children from those parents? If so, what can explain this discrepancy?
Answer:
No difference
Explanation:
First, let us calculate the probability of a child being affected by an autosomal recessive disease carried by both of her parents. The parents are heterozygous (carriers). Assuming the allele for the disease is a, their genotypes would be Aa.
Crossing Aa and Aa:
Aa x Aa
AA Aa Aa aa
The theoretical probability of a child being affected is 1/4.
From the cross as well, the fraction of affected children from a random generation of a family with four children from the carrier parents is also 1/4.
Hence, there is no difference between the two probabilities.
You notice that some E. colicultures failed to grow in the presence of only lactose. You know that normal E. coliare able to metabolize lactose so something must be wrong. Which mutation(s) could explain this
Answer:
The correct answer is "mutations in the lac operon or in the promoter region".
Explanation:
The lac operon es a series of genes that are translated and expressed simultaneously, allowing the cell to metabolize lactose when glucose is absent. The E.coli cultures that failed to grow in the presence of only lactose, could have a mutation that affects the lac operon. This mutation could be present in the promoter region or in the lac operon itself, which will result in the absence of lac operon transcription or in the transcription of one or more non active protein, respectively.
The mutation(s) that could explain why the E. coli cultures failed to grow only in the presence of lactose is: mutations in the lac operon or promoter regions.
Recall:
The lactose operon, also called lac operon, is responsible for the transport and metabolism of lactose in E. Coli when glucose is absent.Thus, the possible reason that would make the E. coli cultures not to grow in the presence of only lactose would most like suggest a mutation which might have occurred in the lac operon or promoter region.
Therefore, the mutation(s) that could explain why the E. coli cultures failed to grow only in the presence of lactose is: mutations in the lac operon or promoter regions.
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How can genomic imprinting affect gene expression in mammalian embryos? How can genomic imprinting affect gene expression in mammalian embryos? Lower expression of the maternal allele of a gene relative to the paternal allele may occur if a maternal allele carries less silencing marks (e.g. methylation) than the paternal allele. Higher expression of the maternal allele of a gene relative to the paternal allele may occur if a paternal allele carries more silencing marks (e.g. methylation) than the maternal allele. Higher expression of the maternal allele of a gene relative to the paternal allele may occur if a paternal allele carries less silencing marks (e.g. methylation) than the maternal allele. Lower expression of the maternal allele of a gene relative to the paternal allele may occur if a paternal allele carries more silencing marks (e.g. methylation) than the maternal allele. Request Answer
Answer:
Genomic imprinting is an epigenetic phenomenon that causes genes to be expressed in a parent-of-origin-specific manner. ... These epigenetic marks are established ("imprinted") in the germline (sperm or egg cells) of the parents and are maintained through mitotic cell divisions in the somatic cells of an organism.
Explanation:
Genomic imprinting affects a subset of genes in mammals and results in a ... In contrast, nonimprinted genes will be expressed from both parental gene ... Surprisingly, mice carrying the mutant nonfunctional allele showed a ... In contrast, embryos that develop within eggs are unable to directly influence maternal resources.
Conservation biologists provide strong arguments about why we should all care about preserving biodiversity. When considering the resources we get from nature as well as the services that ecosystems perform, it is clear that life on earth is threatened when biodiversity itself is threatened. What services are provided by natural, well-functioning ecosystems
Answer: Increase in ambient global temperatures.
Recyling energy to be used again
Regulation of oxygen and carbon dioxide levels
An increase of erosion and siltation along waterways
Explanation:
Answer:
Nutrient cycling
Decomposition of dead organisms
Dispersal of pollen and seeds
Purification of air and water
Reduction of the severity of droughts and floods
Pollination of crops and natural vegetation
Sources of medicines
Regulation of oxygen and carbon dioxide levels
Given the behavior and ecology of this insect, what are some factors that could cause the incidence of Chagas disease to increase in Central and South America in areas like the banana plantation, and why
Answer and Explanation:
There are many physical elements such as temperature, precipitation, humidity, altitude, vegetation, among others, that influence the presence of the insects that transmit the Chagas diseases. Its transmission seems to be enhanced by other social elements, such as the deficiency in basic services, lack of planning, the socio-economical conditions, cultural conditions. Altogether, these factors intervene in the presence of the Chagas disease, a systemic infection caused by the protozoa Trypanosoma cruzi. This protozoan is hosted by different wild and domestic mammals, transmitted to the human by hematophagous insects. The transmission occurs through dejections deposited on skin or mucose during or after the feeding process.
Different rural areas in Central and South America are characterized by a mountain relief (temperatures between 15 and 30ºC - relative humidity between 50 and 90%), as well as by a plane relief associated with alluvial plain (temperature between 20 and 35ºC - media relative humidity of 75%). Vegetation in the mountain area provides a natural habitat to the triatomines, the insects that transmit the Chagas disease.
Constant deforestation in mountains, soil move, the cutting down, firing, have destroyed the natural habitat of the insects, becomming the cause of their arrival to populated centers. As their environment is destroyed, insects migrate to new areas and find refuge in precarious houses that surround the affected areas. Most of these houses have clay walls, a roof made of branches, and no floor. People that live in these conditions do not have economic resources. Indexes of infestation in these houses are high due to the material used for their construction. Insects tend to establish near a source of food, such as domestic animals or even humans. It is also common that these houses have chicken coops and farmyards that also offer good conditions for the insects to live in.
Economic activities are important variables to consider, as these define the way of living in a population.
Agriculture activities are performed with no control or planning. People deforest to plant, getting in contact with the insects' natural habitat, producing environmental changes, and getting in touch with them, enhancing the risks of being infected and of transportin the insects.
In three separate site-directed mutagenesis experiments, scientists altered a catalytic Lys residue in corn PEP carboxylase to an Asn, Glu, or Arg. Which substitution would you expect to have the least effect on enzymatic activity
Answer:
Arginine (Arg).
Explanation:
Lysine (Lys) is a hydrophobic amino acid that contains an α-amino group and an α-carboxyl acid group, and a side chain lysyl. It is a residue positively charged and has polar and hydrophilic properties, being thus similar to the Arg residue. Therefore, it is expected that the replacement of Lys by Arg should not have significant effects on the structure of the PEP carboxylase enzyme.
This type of substitution is named conservative because the replacement is made between amino acids with similar properties, thereby they have less impact on protein function and aren't so easily removed by natural selection compared to non-conservative substitutions.
With this concern in mind, you make plans to increase the stringency of the SSOPs, and develop containment plans to minimize cross-contamination of the nozzles. As long as there is no trace of both bacterial species co-occurring in the same nozzles, you are confident that horizontal gene transfer will not occur. Before you can implement these changes, however, you need to review mechanisms of genetic transfer and gene expression. Consider the following statement: Bacteria can exchange genetic material through conjugation without the need for any protein structures or control mechanisms. Is this statement True or False
Answer:
False
Explanation:
Conjugation in Bacteria is transfer of genetic material between bacteria cells by direct contact between cells or by a bridge-like connection between two cells enforced by a structure called pillus.
There is the presence of an enzyme called traD enzyme close to the pillus which is produced by the donor cell for this process to occur.
There is also the presence of some transporter proteins that aids in the transfer of the genetic material from the donor cell to the recipient cell.
You inject an antibody against the protein tubulin into a living animal cell. After the injection, the cell begins mitosis, but the chromosomes do not become attached to the spindle; in fact, there is no spindle. The contractile ring does, however, form. What do these results mean?
Answer:
The mitotic spindle was “ blocked ” by the action of the antibodies that bind to tubulin.
Explanation:
The tubulin heterodimers consist of α- or β-tubulin structures that form the microtubules, which represent the cytoskeletal of eukaryotic cells. During mitosis, the microtubules are arranged in order to form the mitotic spindle, this structure is critical for the segregation of homologous chromosomes during Anaphase.
Interphase microtubules are required for attaching chromosomes in the middle of the cell during its division, thereby it is expected that the antibodies bind to these microtubules during this process.
The contractile ring is formed by approx. 20 actin filaments that encircle the middle of dividing cells, thereby it is expected that these antibodies are specific of tubulin heterodimers.
what is the name used to describe organisms that exist between the living and non living
12. Researchers have spent decades and several millions of dollars studying diabetes among the Pima and Tohono O’odham tribes. Why hasn’t their research yielded a genetic explanation for the high rates of the disease?
Answer:
A link between cardiometabolic risk factors and race and ethnicity have been studied. It has been found that the rates of cardiometabolic risk factors are higher among ethnic minority populations such as African Americans, Hispanic Americans, and Native Americans.
Rank each of the following in terms of their appearance in the cell during carbohydrate catabolism. 1 represents the first to appear, and 6 represents the last. (Assume only a single round of carbohydrate catabolism took place.)
(6 items)
(Drag and drop into the appropriate area)
First
1. Glucose
2. Fructose-1,6- bisphosphate
3. Glyceraldehyde-3. phosphate
4. Pyruvate
5. Succinyl-CoA
6. Citric acid
Answer:
Explanation:
The correct order of above question is -
1. Glucose
2. Fructose - 1,6 - biphosphate
3. Glyceraldehyde - 3 - phosphate
4. Pyruvate
5. Citric acid
6. Succinyl co- A
Explanation - These all are the step of carbohydrate metabolism in a cell. The carbohydrate is catabolise and successively into smaller forms.
First four steps show the glycolysis process in which by use of ATP glucose molecule breakdown into simpler one.
Last two steps show the kerb's cycle in which citric acid (six carbon compound) is converted into succinyl co - A ( four carbon compound) .
Rhizobium:
feed off dead plants
add nitrogen to soil
are part of the fungi kingdom
all of the above
Answer:
All of the above
Explanation:
Answer:
aLL of the above
Explanation:
which statement describes abiotic factors in an environment ?
What does alternative energy mean?
A. Energy sources produced through technology
B. Energy produced by natural processes
O C. Energy sources other than fossil fuels
D. Energy sources other than solar energy
Answer:
B
Explanation:
Alternative energy is the same thing as renewable energy which should be natural processes
Answer:
C. Any energy that does not use fossil fuels
Explanation:
if you look up the definition of alternative energy, it will tell you it is any energy that does not use fossil fuels.
Calcium blood levels are very tightly regulated with the aid of parathyroid hormone and vitamin D. The statements below represent actions that take place during times of low blood calcium, times of high blood calcium, or neither. Match below mention statements with them.
a. Increased vitamin D activation leads to decreased calcium absorption from the intestines.
b. Increased production Of PTH stimulates activation of vitamin D.
c. Parathyroid glands increase secretion of PTH.
d. Less calcium is reabsorbed by the kidneys.
e. Parathyroid glands decrease secretion of PTH.
f. Osteoclasts are inhibited. leading to decreased breakdown of bone.
g. PTH and vitamin D Stimulate increased breakdown of bore.
The kidneys absorb the functions that occur when the blood calcium level is low, when the blood calcium level is high or not less.
What are the functions of calcium?Calcium is the mineral most associated with healthy bones and teeth, although it also plays an important role in blood clotting, helps muscles contract, and regulates normal heart rhythm and nerve function.
Calcium is needed to build and maintain healthy bones and teeth. Among other roles, it can help control blood pressure. It is best to get enough calcium from foods such as dairy products, green leafy vegetables and tofu.
People usually take calcium by mouth to treat and prevent low calcium levels, muscle cramps, osteoporosis, softening of the bones and PMS.
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After getting their results in, a group of scientists went back and looked at their study. As planned, their experiment consisted of three groups. The first group received a new medicine at a normal dose, the second group received the medicine at half the dose, and the third group received the medicine at twice the dose. Which of the following best describes what went wrong with the scientists’ study?
Answer:
Their experimental design lacks control group
Explanation:
Based on what I read, the scientists don't have a control group as one of the main groups thus they cannot, in scientific sense, say that the medicine is better or worse. You always need a control group receiving no intervention because then we can compare groups and assess the effectiveness of that intervention (in our case if we had control group vs people who received the medicine, we could see if the people who received the medicine had improved condition etc when compared to participants who did not receive anything)
There is no control group in their experimental design. According to what I've read, the scientists don't have a control group as one of the primary groups. Thus, option C is correct.
What is control group?To determine if the treatment is better or worse in a formal scientific sense. You should always have a control group that does not receive any treatment because this allows us.
To compare the groups and evaluate the effectiveness of the intervention. In our case, if we had a control group and participants who did not receive any treatment, we could see if those participants had better health overall.
By focusing on the impact of a single independent variable, a cause-and-effect link can be established.
The independent variable is altered in the treatment group while being held constant in the control group by researchers. The findings of these groups are then compared.
Therefore, no control group in their experimental design.
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