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

In a population of 1000 dragonfly, 80% alleles are dominant. What is the frequency of recessive allele?

• 0.8

• 0.2

• 20%

• 80%

Tags

NGSS.HS-LS3-3

In a population of 250 rats, the recessive allele frequency of short fur is 0.25. What is the dominant allele frequency in the next generation if the population is considered to be in genetic equilibrium?

• 0.25

• 0.5

• 0.3

• 0.75

Tags

NGSS.HS-LS2-2

Which of these factors that is the main cause of change in gene pool?

• mutation occur

• migration occur

• genetic drift occur

• the population size is small

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-LS2-2

NGSS.HS-LS3-3

Which of the following genotypes describes a frequency of homozygous?

• p²

• q²

• 2pq

• both p² and q²

Tags

NGSS.HS-LS4-3

In a Hardy-Weinberg population, the frequency of the a allele is 0.4. What is the frequency of individuals with Aa genotype?

• 0.16

• 0.48

• 0.20

• 0.60

Tags

NGSS.HS-LS2-2

In a population of wildflowers, the frequency of the allele for red flowers was 0.8. What was the frequency of the white allele, the only other allele for flower colour?

• 0.8

• 0.6

• 0.4

• 0.2

Tags

NGSS.HS-LS3-3

Which of the following is not a requirement for maintaining the Hardy-Weinberg equilibrium?

• An increasing mutation rate

• Random mating

• Large population size

• No migration

In a type of mammal, genes for the albino are recessive to the brown hair. It is found that 72 out of 500 mammals are albinos. What is the frequency of the heterozygous albinos in that population?

• 0.75

• 0.47

• 0.38

• 0.25

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3