# How do you find the genotype count?

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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 p2, and the frequency of Aa is equal to 2pq. So, using the information above, the frequency of AA is 16% (i.e. p2 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: p2 + 2pq + q2 = 1. Where ‘p2‘ represents the frequency of the homozygous dominant genotype (AA), ‘2pq’ the frequency of the heterozygous genotype (Aa) and ‘q2‘ 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, p2 represents the frequency of the homozygous genotype AA, q2 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.

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## How are allele numbers calculated?

Allele Frequency

1. Allele frequency is most commonly calculated using the Hardy-Weinberg equation, which describes the relationship between two alleles within a population. …
2. To find the number of alleles in a given population, you must look at all the phenotypes present. …
3. 1 = p2 + 2pq + q2