Drosophila geneticists have isolated many mutations that modify position-effect variegation. Dominant suppressors of variegation [Su(var)s] cause less fre- quent inactivation of genes brought near heterochro- matin by chromosome rearrangements, while dominant enhancers of variegation [E(var)s] cause more frequent inactivation of such genes.
A. What effects would each of these two kinds of mutations have on position-effect variegation of the white gene in Drosophila (that is, would the eyes be more red or more white)?
B. Assuming that these Su(var) and E(var) mutations are loss-of-function (null) alleles in the corresponding genes, what kinds of proteins do you think these genes encode?

Answers

Answer 1

Answer:

A. As it is given that Su(var) dominant suppressors of variegation mutant allele causes lesser white patches and more red patches in eyes as it is an inhibits or inactivates of PEV. If the Drosophila were heterozygous for the dominant enhancers of variegation E(var) mutation, there would be less red patches and more white patches.

b. Su(var) 1 gene encodes for the proteins that assist in the spreading of heterochromatin by inhibits the PEV which will be lost by null mutations while E(var)1 gene encodes for the proteins that restrict the spreading of heterochromatin by loss of function mutation


Related Questions

+
Which fundamental force is being used in this type of
treatment?
- strong
-weak
-gravitational
-electromagnetic

Answers

Answer: Weak.

Explanation:

The complete question is:

Scientists use a substance called Iodine-131 to treat cancer. As Iodine-131 undergoes radioactive decay and emits beta particles, it kill cancer cells. Which fundamental force is being used in this type of treatment?

Well, here we have beta decay.

Beta-decay is when a beta particle (an electron or a positron) is emitted from an atomic nucleus (usually a neutron-rich nucleus). We know that beta decay is a consequence of the weak force or weak interaction (the force responsible for the radioactive decay of atoms)

Then the correct option is the second one, weak.

Answer:

(B) WEAK

Explanation:

(A) strong

(B) weak

(C) gravitational

(D) electromagnetic

Took test got it right 2021 edeg

What causes hurricanes to increase in strength

Answers

Hurricanes gain in strength when they go over areas of warm water and low sheer in the upper atmosphere. Hope this helps :)

Answer:

the greater the evaporation rate of warm moist air, the stronger the hurricane will be.

Explanation:

Severe storms all have extremely strong winds that can cause a lot of environmental damage.
Which storm below has the strongest winds?
O cyclone
O hurricane
O thunderstorm
O tornado

Answers

The storm that has the strongest winds is TORNADO.

A tornado can be defined as a narrow-violent rotating column of air in contact with the ground, which is often attached to the base of a thunderstorm.

It is hard to observe a tornado unless it forms a condensation vertical wind tunnel composed of water droplets and dust.

In the most violent tornadoes, wind speed may reach 300 miles (480 kilometers) per hour.

In conclusion, the storm that has the strongest winds is TORNADO.

Learn more in:

https://brainly.com/question/1146984

Answer: its tornado i just took the test on edge2020  on the storm assignment.

Explanation: :)

What is the advantage of a primate having a curved spine?

Answers

Answer:

depending on what you mean it can allow you to be more flexable or it can have an effect in your posture

Explanation:

:)))))

Psychology. A group of scientists have created a new drug X that helps with anxiety.what is your hypothesis?

Answers

Answer:

The correct answer would be - hypothesis would be "If Drug X treats anxiety, then people who have anxiety and take Drug X should stop having symptoms.”

Explanation:

A hypothesis is an assumed or purposed explanation for a phenomenon on the basis of the available evidence at the beginning of the investigation. It required a scientific method to check if the hypothesis is true or not.

In the given case the most accurate hypothesis would be based on the fact that the drug X is helpful in case of anxiety and if it really helps such a patient then this drug should stop symptoms of anxiety.

True or false Are bacteria protists?

Answers

They are not protists.

Answer:

false

Explanation:

Protists are micro-organelles that are not classified as plant, animal, or bacteria

This picture shows different amounts of space in between the particles of two
different soil samples.

Which word best describes what we are seeing?

Answers

Answer:

Porosity

Explanation:

I had another question like this and it was B so there u go

Meaning of soil porosity: Pore-spaces, also known as voids, are the area of the soil's volume that is not occupied by solids, either mineral or organic, hence option B is correct.

What is soil porosity?

Under field conditions, air and water are always present in the pore space. The amount of water that a specific volume of soil can hold depends on the amount of pore space.

How many pores, or holes, a soil has is referred to as its porosity. A proportion of the total volume of the soil material is used to measure a soil's porosity.

Soil particles are defined as those that are 2 mm in diameter or smaller and make up the inorganic component of soil. Sand, silt, and clay are the three types of soil particles.

Therefore, Porosity is a crucial indicator in locations where groundwater reserves supply drinking water.

Learn more about soil, here:

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Which of the following is a form of kinetic energy?
O A. Gravitational potential energy
O B. Light energy
O C. Elastic energy
O D. Thermal energy

Answers

Answer:

light energy

Explanation:

Also known as light energy or electromagnetic energy, radiant energy is a type of kinetic energy that travels in waves.

Explain why, throughout the history of life on Earth, living beings have been different?

Answers

As for us humans, the first few centuries of our lives, we had a low life expectancy, as the population and years increased for decades it increases and we gain better mecidine and knowledge.

Draw a line to connect the following terms to their definitions. PLZ HURRY!

Answers

A region that has a specific climate and a specific community of plants and animals = biome

A region with low average temperatures and little precipitation = taiga

Long-term temperature and precipitation patterns in a region = climate

why is it an advantage that bundle sheath chloroplast lack grana​

Answers

Explanation\Answer:

Pack sheath chloroplasts don't contain grana (if present not many and poorly created). In mesophyll cells, the light needy response is supported. In group sheath cells, the light autonomous responses are supported. Huge measure of ATPs and diminished coenzymes are created in the mesophyll cells.

I need help with Human Anatomy/Physiology I just need help with the explanations please. :)

Answers

Answer:

The arm is a great example. The muscle would be the biceps brachii and the bones of the shoulder and the arm. The biceps brachii allows you to do flexion -- bringing your forearm closer to your shoulder and Extenion -- extending your arm outward so that it is fully straight.

This looks like a project and will take a lot of time so I provided a starting place to look into.

Explanation:

Answer:

I will explain down below.

Explanation:

So basically if I am correct you are supposed to do a project based off of the skeletal muscle system. You want to, get a piece of paper or a poster and draw a representation on it, then describe what each of the terms are. I am not 100% sure, but I did a project like this before in the past.

I need help in this ASAPPP

Answers

Answer:

1. The reduction of coyote population affects the sheep population by increasing sheep due to them not being preyed upon.

2. The grass population would indeed decrease as a result of the sheep population increasing. Due to this being the sheep's source of energy.

For each of the following scenarios, describe the most likely pathway from beginning of synthesis (when peptide bonds are made) to final location for a protein. Include short descriptions of key steps. The scenarios are: a protein that floats freely in the cytoplasm; a protein that is in the lumen (liquid interior) of a lysosome; a protein that is secreted from a cell; and a protein that is imbedded in the plasma membrane of a cell.

Once you present a detail in one description you can reference it in later descriptions (in other words, there is no need to completely repeat yourself). Your overall description of these four scenarios should be about a page long (total, not each), and should include at least he following terms:

a. ribosome
b. lumen
c. vesicle
d. Golgi apparatus (including cis, medial, and trans regions)
e. lysosome
f. plasma membrane
g. hydrophobic
h. hydrophilic

Answers

Answer:

following are the solution to the given question:

Explanation:

The DNA throughout the core keys of the mRNA by the transcription. Therefore mRNA becomes formed through codons of unique amino acids. That organic molecule consists of mRNA translation. Amino acids were protein sub-units, but various amino acids represent various proteins with one another.

Ribosomes are necessary for both the translation or method of mRNA protein synthesis. Codons of unique amino acids in mRNA embeds. A ribosome adds amino acids to the string or chain of amino acids. Ribosomes may be located free in cytoplasms or bound to the endoplasmic reticulum. Lysosomes are also known as food factories.

The substances are moved to a raw endoplasmic reticulum lumen (RER). That protein was subsequently changed by the addition of sugar molecules. Such adjustments distinguish the proteins from one another. This protein was packed or transferred through RER through organelles. These vesicles are also the RER membrane extensions but are called microsomes.

These microsomes fuse mostly on the cis face and obtaining the face of particular proteins and combine with both the Golgi membranes. Each recipient hand of this Golgi device is called trans head. Protein processing requires a spot in the center face or middle face.

Golgi's device is the double cell wall structure consisting of piles of flat disks called cristae. The protein is categorized, tagged and packaged in the Organelles device and reach their destination. Protein change is done through the inclusion of various carb chain, and phospholipids are applied to the marks. Tagged or graded proteins are packed from the Golgi membrane in the purchasing for vesicles. Those vesicles survive from the Golgi device's trans-face.

These vesicles instead merge into various membranes of cellular processes to bond as protein molecules or carry out various roles. Those vesicles often fuse to form membranes or gastrointestinal enzymes of a lysosome. Lysosomes are eukaryotic cells that absorb stomach acid and eat old cells, cells, etc. neutrophils.

These enzymes are part of several cell organelles' bilipid sheets, including the plasma membrane. Epithelial tissue, with two mm of cholesterol and phospholipids as well as enzymes, is indeed a bilipid structure. It cellular membranes model is known as fluid mosa so because proteins move and move through the membrane. Glycerol, two fatty tails as well as a phosphate-linked direct positive are the polypeptides.

Their tails were inward and focused as well as the faces facing the outside of slice in lipids. For example, its head is also the outer sections of the burger bun as well as the tails are also the inner parts of both the buns.

The tails with saturated fats are hygroscopic and therefore address the inside the heads of the polypeptide chain are hygroscopic such that they address your cell's actively dividing and primary evidence. Throughout the plasma membrane, phosphate groups are therefore called liabilities by their shareholder equity, including hydrophilic and hydrophobic sides, that membrane contains proteins enclosed. Interdisciplinary organisms are known proteins that are completely embedded in the membranes. The external proteins are called certain proteins that are present and bound to a membrane surface and so do not cross that surface.

Organelles found in plant cells that function through respiration to produce energy from oxygen and sugar are called —

Question 20 options:

Chloroplasts


guard cells


photosynthons


mitochondria

Answers

Answer:

The answer is A) Chloroplasts

Answer:

Chloroplasts

Explanation:

hope i helped

if a gene is made up of 20% adenine, how much thymine, guanine, and cytosine will there be

Answers

Explanation:

  You have 20% of adenine. If you have 20% of adenine than you have 20% of thymine, because the amount of adenine and thymine is equal. 20% plus 20% is 40% of adennine and thymine. From 100% DNA bases subtract 40% and you will get 60%. Then divide this by 2 and you will get 30%. 30% of guanine and 30% of cytosine, because their amounts are equal in the DNA stand.

what should you be thinking of before designing your research​

Answers

Answer:

well it depends

Explanation:

you need to use keywords when researching terms or questions and be ready to read.

Salmon live in both fresh water and salt water during their lives. They are born in in fresh water but migrate out to marine waters for most of their life. Eventually, they return to the place they were born in fresh water to spawn. Changing between fresh water and salt water affects the balance of water in their body. Salmon have an internal control system called osmoregulation that restores the balance by negative feedback. This is an example of which characteristic of life

Answers

Answer: The question is incomplete because the options are not given. Here are the options gotten from another website.

A. adaptation

B. reproduction and development

C. response to the environment D. energy transformation

E. maintaining homeostasis

The correct option is maintain homeostasis which is C.

Explanation:

This is because salmon posseses adaptive physical characteristics that help it to suitably live both in freshwater and salt water. This is because homeostasis is the ability to resist any change in order to maintain body internal environment and this is a negative loop feedback. Organs of salmon work to control homeostasis but endocrine and nervous system engage more in maintain homeostasis.

The last option is correct.

The following information should be considered:

This is due to the sal-mon possessing adaptive physical characteristics that help it to suitably live both in fresh-water and salt-water. This epresent the ability to resist any salt-water in order to maintain body internal environment.

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I need help on this.

Answers

Answer:

Option B is correct answer hope it helps

Ima say friction foe dis

Which of the following is the best evidence that supports the rule that only 10% of energy is transferred from one organism to another? (1
There are fewer organisms at the top of the food chain because there is less energy available for life processos
O Ten percent of organisms are fully consumed while others contain some molecules that cannot be digested
Not all organisms at the lower trophic levels will be eaten and die
O Dead organisms and waste are broken down by decomposers and are recycled through the ecosystem

Answers

Answer:

I believe the answer is A

Explanation:

There are fewer organisms at the top of the food chain because there is

less energy available for life processes is the best statement that supports

it.

What is Trophic level?

This is the position an organism occupies in a food chain. The organisms

are usually fewer while those at the bottom have more organisms present

in the chain.

As food chain moves from bottom to the top, the energy level decreases

which depicts 10% of energy is being transferred from one organism to

another

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What is the relationship between photosynthesis and cellular respiration?

Answers

Answer:

Photosynthesis and cellular respiration are essentially opposite processes.

Explanation:

Photosynthesis converts carbon dioxide and water into oxygen and glucose. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Both use one another's products to make their own.

I would appreciate brainliest, if not that's ok!

what regions of dna are used

Answers

Answer:

pfv-tdzg-uzk show u penis

Breathing heavily after running a race is your body's way of *

a. restarting glycolysis.

b. recharging the electron transport chain.

c. repaying an oxygen debt.

d. making more citric acid.

Answers

Answer:

The correct option is C.

repaying an oxygen debt.

Explanation:

This is because while running, humans breath shallowly which could not provide the oxygen requirement for the respiratory system and fit in for blood need.

After running, you tend to breathe heavily because your muscle work very hard , the body use more oxygen and produced more carbondioxide, therefore the lungs and respiratory system must try to provide more oxygen to the blood. sympathetic nerves stimulate respiratory muscles

so as to increase the rate at which we breathe.

Charged atoms and molecules must use a ___________________ to cross through the plasma membrane.

Answers

Answer: protein

Explanation:

Had the exact question!

II
6/15
+100
84
8 17th
2400
Which of the following is the most efficient food
chain in the food web shown in Figure 3-4?
Plants , insect, lizard, snake,
hawk
Plants, quail, coyote
Plants, Quail, Mountain Lion

Answers

vsjhejensmakkMabwbsbjsjaja

Explain some of the reasons why not everyone shows traditional lateralization

Answers

Answer:

The right side of the brain may have developed more than the left side.Both sides of the brain developed equally.

Explanation:

Lateralization is the term used to designate the tendency that some functions of the organism are more developed on one side of the brain. Traditional lateralization, promotes that these functions are more developed on the left side of the brain, making the right side of our body more dominant. However, it may happen that these functions develop more on the right side of the brain, or develop on both sides and in an egalitarian form, causing some people to have lateralization different from the traditional.

PLEASE HELP :(

How do icebergs contribute to rising sea levels?
○ They melt and increase the amount of water in the ocean.
○When they increase in size, they take
water out of the ocean.
○They break away from land, displacing significant amounts of water.
○The number of icebergs has been increasing, taking up more space in the ocean​

Answers

In my knowledge

its option A

they melt and increase the amount of water in the ocean

Answer:

Its C -displacement

Explanation:

The other answer is wrong. It's just like when ice cubes melt in a cup the water level doesn't rise but instead, it increases the volume of the water in the cup by displacing it.

what is a polypeptide chain?

a. the beginning of a protein
b. the strand of mRNA
c. the strand of tRNA

Answers

Answer:

B

Explanation:

the polupeptide chain is from the strand mRNA which makes wate rmolecules digest into polypeptide

What is Earth's major source of air pollution?

Answers

fossil-fuel combustion is the Earth’s major source of air pollution.
stationary sources

mobile sources

area sources

burning fireplaces.
Those are all the four main ones

Select all the advantages of a multienzyme complex over a metabolic pathway


A. There is less room for substrates to diffuse away

B. Each enzyme can be activated or inhibited individually

C. The product of one enzyme will serve as the reactant for the next

D. The complex can be regulated as a group

Answers

Answer:

Option A, B, C

Explanation:

The major advantages of multienzyme complex over a metabolic pathway is that it do not require individual pathway for each enzyme activation or inhibition. Instead it responds efficiently to the equilibrium changes of substrate supply and demand as compared to that of enzymes.

It tightly regulates the processes and is also faster than that of the metabolic pathway.

Hence, option A, B and C are correct

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