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Calculate the expected genotype frequencies from these observed allele frequencies: if p = f(A) and q = f(G), then p2 = f(AA), 2pq = f(AG), and q2 = f(GG). Expected genotype counts in each case are then (frequency) X (total observed).

## What is a genotype count?

Genotype frequency in a population is the number of individuals with a given genotype divided by the total number of individuals in the population. … Genotype frequency may also be used in the future (for “genomic profiling”) to predict someone’s having a disease or even a birth defect.

## How do you determine the number of alleles and genotypes?

Number of genotypes for a given number of alleles Given n alleles at a locus, the number genotypes possible is the sum of the integers between 1 and n: With 2 alleles, the number of genotypes is 1 + 2 = 3. 3 alleles there are 1 + 2 + 3 = 6 genotypes.

## How do you find the genotype of AA frequency?

The frequencies of the genotypes “AA” and “Aa.” Answer: The frequency of AA is equal to p^{2}, and the frequency of Aa is equal to 2pq. So, using the information above, the frequency of AA is 16% (i.e. p^{2} is 0.4 x 0.4 = 0.16) and Aa is 48% (2pq = 2 x 0.4 x 0.6 = 0.48).

## How do you calculate P and Q?

We can calculate the values of p and q, in a representative sample of individuals from a population, by simply counting the alleles and dividing by the total number of alleles examined. For a given allele, homozygotes will count for twice as much as heterozygotes.

## How do you find P and Q in Hardy Weinberg?

The Hardy-Weinberg equation used to determine genotype frequencies is: p^{2} + 2pq + q^{2} = 1. Where ‘p^{2}‘ represents the frequency of the homozygous dominant genotype (AA), ‘2pq’ the frequency of the heterozygous genotype (Aa) and ‘q^{2}‘ the frequency of the homozygous recessive genotype (aa).

## What are genotypes examples?

Genotype examples

A gene encodes eye color. … If the child inherits two different alleles (heterozygous) then they will have brown eyes. For the child to have blue eyes, they must be homozygous for the blue eye allele.

## What is the genotype of RR?

The (RR) genotype is homozygous dominant and the (rr) genotype is homozygous recessive for seed shape. In the image above, a monohybrid cross is performed between plants that are heterozygous for round seed shape. The predicted inheritance pattern of the offspring results in a 1:2:1 ratio of the genotype.

## What is 2pq?

In the equation, p^{2} represents the frequency of the homozygous genotype AA, q^{2} represents the frequency of the homozygous genotype aa, and 2pq represents the frequency of the heterozygous genotype Aa.

## What hypothesis could explain the data for days 7 and 21?

What hypothesis could explain the data for days 7 and 21? At day 7, CYCY individuals were not being selected against because they had not used up the supply of food that was stored in the seed; by day 21, they had run out of stored food and many plants were not surviving.

## How are allele numbers calculated?

Allele Frequency

- Allele frequency is most commonly calculated using the Hardy-Weinberg equation, which describes the relationship between two alleles within a population. …
- To find the number of alleles in a given population, you must look at all the phenotypes present. …
- 1 = p
^{2}+ 2pq + q^{2}