# AP BIOLOGY

## EVOLUTION

### HARDY WEINBERG EQUILIBRIUM

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If there are 25 people and 5 of them are tt, 10 of them are Tt, and 10 of them are TT, what is the frequency for TT?
 A 0.2 B 0.5 C 0.4 D 0.1
Explanation:

Detailed explanation-1: -An allele frequency is calculated by dividing the number of times the allele of interest is observed in a population by the total number of copies of all the alleles at that particular genetic locus in the population. Allele frequencies can be represented as a decimal, a percentage, or a fraction.

Detailed explanation-2: -It is determined by counting how many times the allele appears in the population then dividing by the total number of copies of the gene.

Detailed explanation-3: -The frequency of CC, CT and TT genotypes was 69%, 27% and 4%, respectively.

Detailed explanation-4: -Count up the aa types and you have the observed q2. Then, take the square root of q2 to get q, and then subtract q from 1 to get p. Square p to get p2 and multiply 2*p*q to get the observed heterozygous Aa genotype frequency.

There is 1 question to complete.