Hardy Weinberg

A rather large population of foxes has 555 individuals with tan fur and 390 individuals with red fur. Assume that red is recessive.

What should you try to start with?

• p

• q

• q²

• p²

Tags

NGSS.HS-LS3-3

A rather large population of foxes has 555 individuals with tan fur and 390 individuals with red fur. Assume that red is recessive.

Now that you have q, what should you solve for next?

• p

• q

• q²

• p²

Tags

NGSS.HS-LS3-3

A rather large population of foxes has 555 individuals with tan fur and 390 individuals with red fur. Assume that red is recessive. Calculate the following: 

1. The frequencies of each allele. 

2. The frequencies of each genotype.

3. How many foxes are of the heterozygous genotype?

Answer explanation

Tags

NGSS.HS-LS3-3

NGSS.HS-LS3-2

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-LS3-3

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

• .80

• .04

• .32

• .64

Answer explanation

This is a 2 step question.

1. We have p so we can use that to find q.

p + q = 1 so 0.2 + q = 1

q = 0.8

2. Recessive genotype is q² so we can use q to find the answer. (0.8)² or 0.8 x 0.8 = 0.64

p + q = 1. If p represents the dominant allele frequency, what would q represent?

• the homozygous dominant genotype frequency

• the recessive allele frequency

• the total amount of alleles in the population

• a measure of fitness in the population

p² + 2pq + q² = 1 Which numeric value should be plugged in for 2pq?

Tags

NGSS.HS-LS4-3

0.49 + 2pq + 0.09 =1 Find the value for 2pq.

A rather large population of foxes has 555 individuals with tan fur and 390 individuals with red fur. Assume that red is recessive.

If you started with q² what do you find next?

• p

• q

• q²

• p²

Tags

NGSS.HS-LS3-3

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