Select the correct answer.
The Punnett square for a sex-linked trait is shown. The recessive trait is carried only by the X chromosome. Xr is the recessive allele. Based on the Punnett square, which statement is true?

Xr X
X XrX XX
Y XrY XY

A.
Female offspring have a 50 percent chance of expressing the recessive trait.
B.
Both male offspring will express the recessive trait.
C.
Both female offspring will express the recessive trait.
D.
There’s a 50 percent chance the male offspring will express the recessive trait.

Answers

Answer 1

Answer:

D. There's a 50% chance the male will express the recessive trait

Explanation:

Because X is dominant over Xr, a female could not express it in this punnett square because she will have the extra X chromosome. While males do not have the extra X so if they receive the Xr they will have nothing to "cover" them.

Answer 2

Answer:

d i just took the test

Explanation:


Related Questions

Cell division is not only for generating copy of DNA . Why ? ​

Answers

Answer:

sorry don't know sorry

Explanation:

ok

Answer: During every cell division, a cell must duplicate its chromosomal DNA through a process called DNA replication. The duplicated DNA is then segregated into two "daughter" cells that inherit the same genetic information. ... Healthy cells can perform DNA replication with almost absolute accuracy most of the time.

Which phylum reproduces asexually through budding?

Answers

Answer:

Hydra

Explanation:

The correct answer is - Hydra

Reason -

Budding: Hydra reproduce asexually through budding, where a bud forms that develops into an adult and breaks away from the main body.

Which of the following statements about fungi is true?

a. All fungi are unicellular
b. All fungi have cell walls
c. All fungi are prokaryotic
d. All fungi are autotrophic ​

Answers

it is c im pretty sure

All fungi have cell walls. So, the correct option is B.

What are Fungi?

A fungus is defined as a member of a group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms.

These belong to kingdom Fungi having a cell wall. Among the living organisms, they belong to heterotrophs category. They are classified as plants but do not contain chlorophyll. Their cell wall is made of chitin through which nutrients is obtain by the process called absorption.

They are either decomposers or parasites that obtain their food from other organisms. Fungi are both unicellular and multicellular like yeast is unicellular while other fungi are multicellular.

Thus, all fungi have cell walls. So, the correct option is B.

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What type of weather does a H pressure system bring to an area? *
O wet and cloudy
O Dry and cloudy
O clear skies and sunny
O Hot and Sunny

Answers

Answer:

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

   

✅ Clear skies and Sunny.

Explanation: ❗ Cold air is denser and thicker than warm air, so it usually sinks as warm air increases. Cold air sinks which causes a transient accumulation of water near the earth's area and thus an area with a high pressure in regions where winds meet at high altitude. With an increase in altitude air pressure reduces, so high pressure is in fact a relative concept. Weather forecasters commonly use this to signify high pressure relative to normal atmospheric pressures at that level.

~ ₕₒₚₑ ₜₕᵢₛ ₕₑₗₚₛ! :₎ ♡

~

What is it called when one organism imitates the features or behavior of another?

Answers

Answer:

Mimicry

Explanation:

Mimicry is an evolved similarity ( in traits and behaviors  ) , often between two organisms

An example of mimicry is the resemblance between coral snakes and kingsnakes. A kingsnake is a harmless snake whereas a coral snake is a fairly venomous snake. A kingsnake looks similar to a coral snake ( mimics its features) leading to kingsnake predators often intimidated by the kingsnakes appearance, because like stated before coral snakes are venomous and kingsnakes mimic their features.

Answer:

Mimicry is the similarity of one organism (the mimic) to another (the model) that enhances the mimic's fitness through its effect on the behavior of a third party, the operator.

Explanation:

a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic.

Bob thinks that plants get their materials for growth from the soil. Write a couple of sentences to explain why is Bob incorrect.

Answers

bob is incorrect because plants gets all the materials they need to grow from H2o(water) and air. Sunlight provides energy to help convert water and carbon dioxide

What decreases in the water when algae grow quickly?

Answers

Answer:

Fish and other insects

Explanation:

Hope that helps

The fish in the water

Structure of plant cell

Answers

Answer:

A cell wall, a broad central vacuole, and plastids such as chloroplasts are all present in plant cells. The cell wall is a dense layer that covers the cell and provides structural support and protection. It is located outside the cell membrane. The turgor pressure against the cell wall is maintained by the central vacuole.

Explanation:


Pollutants can enter a body of water at a specific, identifiable location.
Which term describes this type of pollution? *
inorganic wastes
biological pollutants
point-source pollution
nonpoint-source pollution

Answers

Answer:

C

Explanation:

it is called point because the source can be identified

4. Which of the following is NOT true of the digestive system? a. The stomach contains acids to break down food b. Digestion begins with enzymes in the stomach c. The large intestine absorbs water from the digestion of nutrients d. The small intestine does most of the absorption of nutrients

Answers

Answer:

B. Digestion begins with enzymes in the stomach

Explanation:

The digestive process starts in your mouth when you chew. Your salivary glands make saliva, a digestive juice, which moistens food so it moves more easily through your esophagus into your stomach. Saliva also has an enzyme that begins to break down starches in your food.

If Petal color was a complete dominant trait (A being red petals and a being white), what percent.
of offspring would be red?
hito what percentage of offspring would be red?

Answers

Answer:

75%

Explanation:

3/4ths are dominant, so 75% will be red.

Answer:

75%

Explanation:

what do ducks and snake have in common.

Answers

Answer:

they both can see behind them

Explanation:

5.) The following examples are vestigial organs EXCEPT:
O appendix
O tailbone(coccyx)
O human liver
O Pelvic bone(little bone) of the snake

Answers

Answer:

C

Explanation:

because a vestigal organ is one that serves no relevant purpose and we do not need any of the following options except for the liver.

what type of organisms contains plasmid DNA

Answers

Answer:

archaea and eukaryotic organisms

Explanation:

In nature, plasmids often carry genes that may benefit the survival of the organism, for example antibiotic resistance.

Answer:

archaea and eukaryotic organisms

Explanation:

In the sporophyte plants produce ________________________?

Answers

Answer:

spores

Explanation:

plant body grows and eventually produce spores through meiosis.These spores divide mitotically to produce haploid (having a single set of chromosomes)

after leaving the proximal convoluted tubule, filtrate drains into

Brownmans capsule
Distal convoluted tubule
Descending loop of Henle
Ascending loop of henle

Answers

Answer:

I think the answer is distal convoluted tubule

Answer:

descending loop of henle

What is the main function of a plant stem?

Answers

The primary functions of the stem are to support the leaves; to conduct water and minerals to the leaves, where they can be converted into usable products by photosynthesis; and to transport these products from the leaves to other parts of the plant, including the roots.

5. In a rainforest, giant trees normally live for hundreds of
years. However, when they do die and fall to the ground,
hundreds of seedlings will compete to take its place. What
adaptation is most necessary for a young tree to mature in
this environment?
A. The ability to grow vertically at a rapid rate
B. The ability to establish a deep root system while
growing at a slow and steady rate
C. The ability to retain water to survive in drought
D. The ability to grow narrow, small leaves

Answers

Answer:

b

Explanation:

i think im right

Thinking about the process of meiosis, how do you think it is possible for gametes to end up with too many or too few chromosomes?

Answers

But an egg or sperm only has one. That one is chosen at random, through a process called meiosis. When meiosis messes up, you can end up with to many or too few chromosomes. One extra chromosome in a egg or sperm means three in the fertilized egg and so trisomy.

Through the process of meiosis, it is possible for gametes to end up with too many or too few if they fail to separate properly.

What is Meiosis?

Meiosis is defined as the specialized type of cell division of germ cells in sexually-reproducing organisms that produces gametes such as sperm or egg cells. This involves two rounds of division which eventually result in four cells with only one copy of each chromosome.

This is called reduction division because the number of chromosomes in the daughter cells becomes half that of the parent cell. For example, a human cell has 46 chromosomes, but the egg and sperm cells produced as a result of meiosis have 23 chromosomes.

If chromosomes split unequally, an egg or sperm may end up with too many or too few chromosomes; when one of these participates in fertilization, the embryo may end up with too many or too few chromosomes.

Thus, through the process of meiosis, it is possible for gametes to end up with too many or too few if they fail to separate properly.

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Verdadero o falso mediante el genotipo podemos determinar si existen dominancia en una característica

Answers

Answer:

Verdadero

Explanation:

Sabemos que los caracteres dependen de los genes. Y los genes pueden presentarse en forma de alelos dominantes, o alelos recesivos. La expresión de los alelos recesivos son enmascarados o escondidos por el alelo dominante. Es decir, que si ambos alelos se encuentran juntos en un heterocigota, solo el alelo dominante se expresará.

Entonces el alelo dominante expresa la característica que resulta dominante, mientras que el alelo recesivo expresa la característica recesiva.

Genotipo:

Homocigota dominante ----> Expresa caracter dominante (Solo el alelo dominante esta presente)Heterocigota -------------------> Expresa el caracter dominante (Ambos alelos estan presentes, pero el dominante es quien se expresa)Homocigota recesivo --------> Expresa el caracter recesivo (solo alelos recesivos estan presentes)

Por ejemplo, si tenemos dos fenotipos rojo y amarillo, y sabemos que el color esta codificado por un gen dialelico llamado M. También supongamos que no sabemos qué alelo expresa qué color. Teniendo solo estos datos, no podemos decir si el rojo es el color dominante o si el amarillo lo es.

Sin embargo, si tenemos los siguientes genotipos acompañando esta información:

MM--> AmarilloMm--> Amarillomm --> Rojo

Recién ahora podemos deducir que el caracter dominante es el amarillo.

PLS HELP ME AND U WILL BE MARKED BRAINIEST

Answers

A

The reason for this answer is because this is the only answer that helps in some way while the other answers don't help any aspect of moving into a household.

True or False? Organ systems work in isolation and do not work with other organ systems.

Answers

The answer is False. Nothing in an organism works in isolation

What molecule is used to find the direction of each DNA strand?

Answers

Answer:

5' to 3'

Explanation:

Answer:

Only the 5' to 3' path of DNA is synthesized. If you know the sequence of the template strand, you can figure out the complementary strand's sequence. Each base in one strand adheres to its partner in the other.

Explanation:

Hope this helps!

Please mark me as Brainliniest.

Cystic Fibrosis is an autosomal recessive disorder. Neither parent has the disease. Their first child (Joey) Has cystic fibrosis. What is the genotype of the both parents? Use the letter A for the alleles for cystic fibrosis.​

Answers

Answer:

Explanation:

br.uh quit spamming this question

They are both heterozygous for the CF gene

please help meh i will give brainliest

Answers

Answer:

Power has to travel a long distance over power lines to reach cities. Because there is no power plants.

Explanation:

Please tell me if I am wrong! good luck!

Answer:

It is expensive because of the pole and the generator you would have to build.

Explanation:

Which of the following contributes most to promoting sustainability in an ecosystem?

A. Lack of decomposers
B. A balanced water table
C. Variety of organisms
D. A narrow temperature range

Answers

Answer:A

Explanation:

A variety of organisms contributes most to promoting sustainability in an ecosystem. Hence, option C is correct.

What is an ecosystem?

An ecosystem is a region where a bubble of life is created by plants, animals, and other organisms interacting with the weather, environment, and other factors. Abiotic variables, or nonliving components, coexist with biotic components in ecosystems.

Based on their overall environments, ecosystems can be divided into three basic categories: freshwater, marine, and terrestrial. Individual ecosystem types based on the environmental habitat and creatures present can be found within these three categories.

A variety of organisms contributes most to promoting sustainability in an ecosystem. Hence, option C is correct.

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If both the biceps and triceps muscle contract at the same time, what happens?

Answers

Answer:

when one muscle is contracted, the other muscle from the pair is always elongated. for example, the biceps and tricep muscles work together to allow you to bend and straighten your elbow. when you want to bend your elbow, your bicep muscle contracts. and at the same time tricep muscles relaxes.

Explanation:

Hope this helped Mark BRAINLIEST!!

The diagram below represents an energy pyramid constructed from data collected from an
aquatic ecosystem. Which statement best describes this ecosystem?

A.The ecosystem is most likely unstable.
B.The herbivore populations will continue to increase in size for many years.
C.Long-term stability of this ecosystem will continue.

D.The producer organisms outnumber the consumer organisms.

Answers

D. The producer organisms outnumber the consumer organisms.

Energy pyramids are the models that show the flow of energy from the primary to the next level. From the energy pyramid, it can be said that long-term stability will be continued. Thus, option C is correct.

What are energy pyramids?

Energy pyramids are the representation of the energy levels and the primary producers and other consumers. The producers are the base of the pyramid followed by the primary consumers.

In an aquatic ecosystem, the algae are the primary producers that provide energy to plankton and act as primary consumers. These are get eaten by small fishes and large fishes. The number of consumers gets decreased as one rises to the upper level.

Therefore, option C. an aquatic ecosystem will have stability.

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What is karotyping and how is it used in science / medical field??

Answers

Answer:

Karotyping is a chromosomal analysis. It can be used to look for diseases caused by irregularities in the chromosomes, such as Down syndrome.

Explanation:

Karotyping is a chromosomal analysis of the chromosomal constitution of the nucleus of a cell, which is equal to the complete chromosomal makeup of a person. The chromosomes of each species have a certain structure both in size, shape and their own band when they are stained in the laboratory. This allows them to be identified as well as to know if all the genetic information is in the correct order. In addition to numerical abnormalities in chromosomes, structural alterations mean that certain chromosomal regions can be duplicated or even absent. This gain or loss of genetic material has highly varied consequences depending on the genes involved. Another type of structural alterations are translocations and inversions. The karyotype can be studied in search of diseases caused by irregularities in the chromosomes, such as Down syndrome. It also helps to identify problems that a baby conceived through assisted reproduction may have when it is born, by extracting the karyotype that is found in the amniotic fluid of the embryo.

Explain how the information from stimuli can become a memory or result in a behavior. WILL GIVE BRAINLIEST IF CORRECT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer: look at the picture

Explanation: Hope this help :D

Answer:

I tried it for the person above me and it worked Thanks!!

Explanation:

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