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3 years ago

Chromatin modifications that tend to inhibit transcription include:

Biology

1 answer:

Masteriza [31]3 years ago

5 0

Answer:

a. methylation at lysine 9 or 27 of histone H3.

Explanation:

Methylation causes the switching off of genes using steric hinderance to prevent access to DNA.

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The correct answer choice would be D) an area with limestone deposits

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Which elements are best known for helping performers memorize an epic poem?

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The elements that are best known for helping performers memorize an epic poem are rhyme, rhythm, and repetition of certain words.

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3 years ago

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Complete the sentence. The ________________ of extra rabbits into a forest ecosystem can affect the population of other herbivor

lara31 [8.8K]

The immigration of extra rabbits into a forest ecosystem can affect the population of herbivores living in the forest.

<h3>What is immigration?</h3>

Immigration is the movement of people or animals from external locations into a population.

With new individuals moving into a population, the population size increases with other factors being constant.

With the increase in the population size, competition for resources increases accordingly.

Thus if extra rabbits move into a forest ecosystem, the population of herbivores existing in the ecosystem would be affected because competition for food would increase.

More on immigration can be found here: brainly.com/question/13688875

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2 years ago

The gene for flower position in pea plants exists as axial or terminal alleles. Given that axial is dominant to terminal, list a

____ [38]

Answer:

A A

a Aa Aa

All the offspring have flower located at axial position

A a

A AA Aa

a Aa aa

Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position

Only offspring with genotype "aa" will have flower located at terminal position

Explanation:

Let the allele "A" represent the characteristics of axial position of flower

Let the allele "a" represent the characteristics of terminal position of flower

Given -

"A" is dominant over "a"

F1 generation -

Two parents with homozygous genotype for both A and a are crossed . The punnet square for the cross between "AA" and "aa" is as follows -

A A

a Aa Aa

Thus the genotype of offspring is "Aa"

Since, "A" is dominant over "a", all the offspring have flower located at axial position

F2 generation-

The cross between two parents having heterozygous genotype "Aa" will take place .

The punnet square for the cross between "Aa" and "Aa" is as follows -

A a

A AA Aa

a Aa aa

Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position

Only offspring with genotype "aa" will have flower located at terminal position

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2 years ago