18.1 Population genetics

Question 1

define gene pool

Answer 1

all the alleles of all the genes of all the individuals in a population at a given time

Question 2

define allelic frequency

Answer 2

the number of times an allele occurs within a gene pool

Question 3

what is the Hardy-Weinberg principle

Answer 3

mathematical equation that predicts allele frequencies will not change from generation to generation

Question 4

conditions under which hardy weinberg principle applies

Answer 4

no mutations arise
the population is isolated (no flow of alleles into or out of population)
no selection. all alleles equally likely to be passed to next generation
population is large
mating within population is random

Question 5

the hardy weinberg equation

Answer 5

probability of dominant allele=p
probability of recessive allele=q
p+q=1
and 
p2+2pq+q2=1

Question 6

what does the hardy weinberg principle predict?

Answer 6

proportion of dominant and recessive alleles of any gene in the population remains the same from one generation to the next