Population Genetics

A gene pool consists of ..

• all the alleles selected by natural selection

• all the alleles present in a population

• the entire genome of a sexually reproducing organism

• the frequencies of the alleles for a gene locus within a population

Tags

NGSS.HS-LS4-2

In a rat population that is in equilibrium, the frequency of recessive white fur allele is 0.25. Calculate the frequency of the heterozygous rat.

• 0.188

• 0.5

• 0.375

• 0.75

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

You sample a population of butterflies and find that 42% are heterozygous for a particular gene. What would be the frequency of the recessive allele in this population?

• 0.30

• 0.49

• 0.70

• Allele frequency cannot be estimated from this information.

Tags

NGSS.HS-LS3-3

In a population of cows at genetic equilibrium, 1500 cows have dominant grey coat, while the remaining 500 cows have recessive white coat. If all the white coat cows were sold and the remaining cows were left to breed randomly, what is the number of white coat cows in the next generation of 1000 cows?

• 109

• 250

• 442

• 500

Tags

NGSS.HS-LS3-3

A farmer has 2000 cows. A total of the 1500 cows are brown coated and the rest are white coated. Allele B for the brown coat is dominant while allele for b for the white coat is recessive. Assume that the population of the cows is at genetic equilibrium and bred randomly.

Calculate the genotype frequencies in the F₁ generation if the cows are left to bred randomly.

• p² = 0.25 2pq = 0.5 q² = 0.25

• p² = 0.5 2pq = 0.5 q² = 0.5

• p² = 0.5 2pq = 0.25 q² = 0.5

• Genotype frequency cannot be estimated from this information.

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

In a population of cows at genetic equilibrium, 750 cows have long horns (dominant trait), while remaining 250 cows have short horns (recessive traits). What is the frequency of dominant allele?

• 0.25

• 0.5

• 0.67

• 0.75

Tags

NGSS.HS-LS3-3

Use the following information to answer the questions below.

Albinism is a hereditary disease due to the absence of the skin pigment melanin. The allele for albinism is recessive to the allele for normal pigmentation. One person in 10,000 is an albino.

What is the percentage of homozygous dominant in this population?

• 10 %

• 56 %

• 74 %

• 98 %

Tags

NGSS.HS-LS3-3

Use the following information to answer the questions below.

Albinism is a hereditary disease due to the absence of the skin pigment melanin. The allele for albinism is recessive to the allele for normal pigmentation. One person in 10,000 is an albino.

What is the number of individuals in this population who are carriers?

• 100

• 200

• 150

• 250

Tags

NGSS.HS-LS3-3

Use the following information to answer the questions below.

Albinism is a hereditary disease due to the absence of the skin pigment melanin. The allele for albinism is recessive to the allele for normal pigmentation. One person in 10,000 is an albino.

What is the frequency of carrier?

• 0.02

• 0.20

• 0.32

• 0.48

Tags

NGSS.HS-LS3-3

Use the following information to answer the questions below.

Albinism is a hereditary disease due to the absence of the skin pigment melanin. The allele for albinism is recessive to the allele for normal pigmentation. One person in 10,000 is an albino.

What is the frequency of the dominant allele?

• 0.01

• 0.10

• 0.09

• 0.99

Tags

NGSS.HS-LS3-3