Chapter 23 Concept Map 2/5

Hardy-Weinberg Principle

Allele frequencies and phenotype frequencies will reamin constant in a non-evolving population

Variables:

2 Major Uses:

Assumptions:

Determining if a population is in HW eequilibrium

Determining the frequency of the different alleles and phenotypes

4 Steps:

States that:

Use 1:

Use 2:

Calculate observed phenotype frequencies

Calculate frequency of recessive and dominant alleles

Calculate expected phenotype frequencies

Frequency of a homozygous phenotype (usually recessive)

By starting with:

Compare expected to observed frequencies

2pq

Heterozygous Phenotype

Starting with the dominant allele use the equation:

p= 2(# Dominant) + (# recessive)​​​​​​

2(population size)

Step 2:

Step 1:

By:

Step 3:

Step 4:

No Gene Flow

Extremely Large Population Size

No Natural Selection

Random Mating

No Mutations

q

Recessive Allele

P^2

Homozygous Dominant phenotype

q^2

Recessive Homozygous Phenotype

p

Dominant Allele