7B The Hardy-Weinberg Principle

Question 1

Define species

Answer 1

A group of similar organisms that can breed together to produce fertile offspring

Question 2

Define population

Answer 2

A group of organisms of the same species living in a particular area at a particular time - they have the potential to inbreed

Question 3

Define a gene pool

Answer 3

Complete range of alleles present in a population

Question 4

Define allele frequency

Answer 4

How often an allele occurs in a population

Question 5

What does the Hardy Weinberg principle predict

Answer 5

The frequency of alleles in a population won’t change from one generation to another

This is only true in a large population with no immigration, emigration mutations or natural selection

Question 6

Hardy Weinberg principal equation to predict allele frequency

Answer 6

p+q=1
P equals the frequency of one allele usually the dominant allele
q Equals the frequency of another allele usually the recessive allele

Question 7

Hardy Weinberg principal equation to predict genotype and phenotype frequency

Answer 7

P squared + 2pq + q squared =1
P squared equals the frequency of the homozygous dominant genotype
2pq the frequency of the heterozygous genotype
q squared the frequency of the homozygous recessive genotype

Question 8

Hardy Weinberg principal equation to predict the percentage of a population that has a certain genotype

Answer 8

P+Q= 1
P squared + 2pq + q squared = 1

P equals the frequency of one allele usually the dominant allele
q Equals the frequency of another allele usually the recessive allele

P squared equals the frequency of the homozygous dominant genotype
2pq the frequency of the heterozygous genotype
q squared the frequency of the homozygous recessive genotype