Population Genetics and Selection

Genetic equilibrium in a population refers to ..

• constant allele frequencies in successive generations

• constant mutation rate in the population

• equal numbers of dominant and recessive alleles

• equal numbers of males and females

Tags

NGSS.HS-LS4-3

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-LS4-3

NGSS.HS-LS4-4

Random mating is defined as

• members of a population choose to mate with individuals of a particular phenotype

• members of a population choose to mate with unrelated individuals

• members of the population mate with each other without regard to their phenotypes or genotypes

• members of a population choose to mate with closely related individuals

When a gene pool of a population changed, it means ...

• number of organims in the population changes

• organisms in the population are breeding randomly

• the population is in genetic equilibrium

• the population is undergoing evolution

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

NGSS.HS-LS4-5

The effect that is produced when an insect carries pollen grains from one population to another is called

• gene flow

• random mating

• mutation

• mutation

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, calculate the gene pool for length of fur.

• 250

• 500

• 1000

• 125

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-LS4-2

NGSS.HS-LS4-4

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

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