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brilliants [131]
2 years ago
4

Allozyme phenotypes of alcohol dehydrogenase in the flowering plant Phox drummondii are determined by three co-dominant alleles

of a single gene. In one sample of 70 plants the following data were obtained:Genotype A1A1 A2A2 A3A3 A1A2 A1A3 A2A3Number 4 24 10 10 2 20What is the frequency of the A3 allele in this sample?Multiple Choicea. 0.411b. 0.143c. 0.525d. 0.248e. 0.300
Biology
1 answer:
Sever21 [200]2 years ago
8 0

Answer: E. 0.300

Explanation:

First calculate for the gene frequency = genotype/total population

I.e. for A1A1, the genetic frequency = 4/70 = 0.057. Applying the same formula will give you the genetic frequencies of;

A2A2 = 0.34, A3A3 = 0.14, A1A2 = 0.14, A1A3 = 0.03, and A2A3= 0.29.

The frequency of A3 allele = 0.14 + (1/2 × 0.03) + (1/2 × 0.29)

Frequency of A3 allele = 0.300.

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Black coat color in horses is conferred by the presence of a dominant B allele. Chestnut horses are genotype bb. A population of
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Answer:

Frequency of B allele is 0.6681

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If p represents the frequency of dominant allele and q represents the frequency of  recessive allele, according to Hardy-Weinberg equilibrium:

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