# Question: What is the dominant phenotype in Hardy Weinberg?

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## How do you determine dominant phenotype?

To identify whether an organism exhibiting a dominant trait is homozygous or heterozygous for a specific allele, a scientist can perform a test cross. The organism in question is crossed with an organism that is homozygous for the recessive trait, and the offspring of the test cross are examined.

## Is P or Q dominant in Hardy-Weinberg?

Those who express the trait in their phenotype could be either homozygous dominant (p²) or heterozygous (2pq). The Hardy-Weinberg equation allows us to predict which ones they are. Since p = 1 – q and q is known, it is possible to calculate p as well.

## How do you find the frequency of the dominant phenotype in Hardy-Weinberg?

Use the Hardy-Weinberg equilibrium.

1. Alleles: p+q=1.
2. p=frequency of the dominant allele. …
3. p2=frequency of homozygous dominant genotype. …
4. In your scenario, the dominant phenotype has a frequency of 0.19 .
5. This is misleading, since both the p2 and 2pq terms represent the dominant phenotype. …
6. If q2=0.81 , we can determine q .

## Is BB a dominant phenotype?

An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. … In the eye color example, this genotype is written bb. Of these three genotypes, only bb, the homozygous recessive genotype, will produce a phenotype of blue eyes.

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## How do you determine if a gene is dominant or recessive?

Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.

## Is P or Q recessive?

In the simplest system, with two alleles of the same locus (e.g. A,a), we use the symbol p to represent the frequency of the dominant allele within the population, and q for the frequency of the recessive allele.

## How do you find the dominant allele frequency?

The frequency of the dominant allele in the population. Answer: The frequency of the dominant (normal) allele in the population (p) is simply 1 – 0.02 = 0.98 (or 98%). The percentage of heterozygous individuals (carriers) in the population.

## How do you calculate phenotype frequency?

To compare different phenotype frequencies, the relative phenotype frequency for each phenotype can be calculated by counting the number of times a particular phenotype appears in a population and dividing it by the total number of individuals in the population.

## How do you determine genotype frequencies in Hardy-Weinberg equilibrium?

To know if a population is in Hardy-Weinberg Equilibrium scientists have to observe at least two generations. If the allele frequencies are the same for both generations then the population is in Hardy-Weinberg Equilibrium.