Topic 27

Question 1

When is the population said to be in Hardy-Weinberg equilibrium?

Answer 1

If the observed frequencies do not show a significant difference from these expected frequencies

Question 2

Hardy-Weinberg Law

Answer 2

if population is very large and random mating takes place, the allele frequency remains unchanged (in equilibrium) over time, unless some other factor intervenes

Question 3

Genotype frequencies- dominant homozygous

Answer 3

p2

Question 4

Genotype frequencies- heterozygous

Answer 4

2pq

Question 5

Genotype frequencies- recessive homozygous

Answer 5

q2

Question 6

Total genotype frequencies

Answer 6

1

Question 7

Genotype number- recessive homozygous

Answer 7

q2N

Question 8

Total Genotype number

Answer 8

N i.e. population size

Question 9

Hardy Weinberg proportions

Answer 9

= p+q+r = (p+q+r)2 = p2+q2+r2+2pq+2pr+2qr

Question 10

Assumptions of the Hardy Weinberg principle

Answer 10

Random mating, Absence of migration, Absence of new mutations, Natural selection only