Calculating Allele Frequency

If the frequency of recessive allele is 0.2, what is the frequency of the homozygous recessive individuals?

• 0.04

• 0.16

• 0.4

• 0.8

Answer explanation

The frequency of homozygous recessive individuals is 0.04, which is calculated by squaring the frequency of the recessive allele (0.2 x 0.2 = 0.04).

Tags

NGSS.HS-LS4-3

The allele frequency of p=.20 What is the frequency of the heterozygous genotype?

• .80

• .04

• .32

• .64

Answer explanation

This is a 2 step qestion.

1. Find q by plugging in p to the equation p + q = 1. You should get q = 0.8

2. Plug in p and q to 2pq to find the heterozygous frequency. 2(0.2)(0.8) = 0.32

Tags

NGSS.HS-LS4-3

A population of 150 individuals has an allele frequency of 0.3 for the dominant allele (B) and a frequency of 0.7 for the recessive allele (b). Use the Hardy-Weinberg equation to determine the frequency of the genotype (bb).

• 0.09

• 0.42

• 0.49

• 0.21

Answer explanation

This question gives you p and q. It is asking you to find the recessive genotype, which is q². Use q (0.7) and square it to find the correct answer.

(0.7)² or 0.7 x 0.7 = 0.49

Which Hardy-Weinberg factor represents the frequency of heterozygous individuals in a population?

• p²

• 2pq

• q²

• p

• q

Tags

NGSS.HS-LS4-3

If the frequency of allele A is 0.6, what is the frequency of allele a in a population in Hardy-Weinberg equilibrium?

• 0.4

• 0.6

• 0.2

• 0.8

What is the frequency of the dominant allele in this population?

• 30%

• 50%

• 63%

• 37%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

There are 3 T alleles and 7 t alleles in a population. Calculate the frequency of the recessive allele.

• 30%

• 70%

• 10%

• 4%

Tags

NGSS.HS-LS2-2

• Frequency of the dominant allele

• Frequency of the recessive allele

• Frequency of the homozygous dominant genotype

• Frequency of the heterozygous genotype

Tags

NGSS.HS-LS4-4

If the frequency of a recessive allele is 0.3, what is the frequency of homozygous recessive individuals?

• 0.09

• 0.49

• 0.21

• 0.7

Tags

NGSS.HS-LS4-3

In a population, the frequency of allele A is 0.7. What is the frequency of allele a in Hardy-Weinberg equilibrium?

• 0.3

• 0.7

• 0.49

• 0.21

Tags

NGSS.HS-LS4-3