3.7.2 Populations

Question 1

Define a population

Answer 1

A group of organisms of the same species occupying a particular space at a particular time that can potentially interbreed.

Question 2

What is a gene pool

Answer 2

The total number of different alleles of all genes present in a population at a given time.

Question 3

What is allele frequency

Answer 3

The proportion of a particular allele within a gene pool expressed as a decimal or percentage.

Question 4

What does the Hardy-Weinberg principle predict

Answer 4

The allele frequencies in a population will remain constant from generation to generation.

Question 5

State the conditions required for the Hardy-Weinberg principle to apply

Answer 5

No mutations Random mating No natural selection Large population size No gene flow.

Question 6

Write the Hardy-Weinberg equation for calculating genotype frequencies

Answer 6

p^2 + 2pq + q^2 = 1

Question 7

What does p represent in the Hardy-Weinberg equation

Answer 7

The frequency of the dominant allele.

Question 8

What does q represent in the Hardy-Weinberg equation

Answer 8

The frequency of the recessive allele.

Question 9

What does p^2 represent in the Hardy-Weinberg equation

Answer 9

The frequency of the homozygous dominant genotype.

Question 10

What does q^2 represent in the Hardy-Weinberg equation

Answer 10

The frequency of the homozygous recessive genotype.

Question 11

What does 2pq represent in the Hardy-Weinberg equation

Answer 11

The frequency of the heterozygous genotype.