Question: What is the dominant phenotype in Hardy Weinberg?

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.