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Tanya [424]
3 years ago
6

When is genetic drift a major factor in evolution?

Biology
2 answers:
Alex777 [14]3 years ago
6 0

Answer:

B) when there is no selective pressure

Explanation:

Genetic drift refers to a chance act acting over genetic variations or alleles previously distributed evenly over a population, drastically altering the distribution. For example, if I had 100 rabbits with coats white, brown, gray and black and suddenly a disease broke that killed all my black and brown rabbits, the genetic variation allowing for brown and black coats would have disappeared. This is a chance act, as the black and brown rabbits were not intentionally affected. Also there was no selective pressure for rabbits to develop one coat color, that's why the genetic variation was distributed evenly. This is different from artificial selection, as the eradication of black and brown coats was due to a random event, we did not select the coat color like people do for artificial selection.

Anestetic [448]3 years ago
4 0

Some answers can be:

When there is no selective pressure

When there is low gene flow

When there is a bottleneck


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With the knowledge of the nucleotide sequence of a gene, which one of the following could you determine with the most accuracy?
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<u>Primary structure of the protein </u>can be determined With the knowledge of the nucleotide sequence of a gene.

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1 year ago
What is the difference between static and current electricity? give an example of each
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3 0
3 years ago
Imagine you are a geneticist interested in studying a newly discovered species of very colorful birds. You have found that a sin
kolbaska11 [484]

The frequency <em>p</em> of the yellow (A) allele is  <em>p</em>= 0.3

The frequency <em>q</em> of the blue (a) allele is  <em>q= </em><em>0.7</em>

Hardy–Weinberg equilibrium,  states that allele and genotype frequencies in a population will remain constant from generation to generation. Equilibrium is reached in the absence of selection, mutation, genetic drift and other forces and allele frequencies p and q are constant between generations. In the simplest case of a single locus with two alleles denoted A and a with frequencies f(A) = p and f(a) = q, the expected genotype frequencies under random mating are f(AA) = p² for the AA homozygotes, f(aa) = q² for the aa homozygotes, and f(Aa) = 2pq for the heterozygotes.  

p²+2*p*q+q²= 1       p+q= 1     q= 1-p

yellow (p²)= 9%= 0.09               p= √0.09= 0.3

green (2*p*q)= 42%= 0.42        

blue (q²)=49%= 0.49                q=1-0.3= 0.7 <em>or</em> q= √0.49= 0.7


4 0
3 years ago
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