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andriy [413]
3 years ago
11

Choose the best answer to complete the sentence. Directional selection can be distinguished from disruptive selection by _______

.
a. the elimination of extreme variations of traits
b. selection for two extreme variations of a trait
c. the preservation of gene frequencies
d. selection for one extreme variation of a trait
Biology
2 answers:
Stels [109]3 years ago
8 0

Answer:

The answer is D

Explanation:

I just took the test

Vinvika [58]3 years ago
6 0
I think the correct answer from the choices listed above is option A. Directional selection can be distinguished from disruptive selection by the elimination of extreme variations of traits. Directional selection is a natural selection where an extreme phenotype is favored than others.
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Read 2 more answers
Examine a two-gene cross that follows simple Mendelian inheritance of freckles and eyebrow shape between a woman with genotype M
Brilliant_brown [7]

Answer:

b

Explanation:

First, let us look at the result of crossing the two genotypes Mmpp and mmpp.

Mmpp will give the gametes Mp, Mp, mp, and mp

mmpp will give the gametes mp, mp, mp, and mp

The two sets of gametes can thus be lined up on both axis of the Punnet's square as shown in the attached image.

Genotypes of the offspring: 8 Mmpp and 8 mmpp

<u>Since the two genes follow simple Mendelian inheritance pattern, the 2 genotypes automatically equates to 2 phenotypes in the ratio 1:1.</u>

<em>Hence, the correct option is </em><em>b</em><em>.</em>

4 0
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