Frequent question: What is the frequency of a dominant allele?

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 find the frequency of a dominant phenotype?

1 Answer

  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 .
  7. q=√q2=√0.81=0.9.

How do you calculate allele frequencies?

Allele frequency refers to how common an allele is in a population. 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.

The rate of increase in frequency of the favored allele will depend on whether the allele is dominant or recessive. … In general, a new favored dominant allele will increase rapidly in the population, because even the heterozygous individuals have the “improved” phenotype (produce more surviving offspring).

What will happen to the frequency of the recessive allele?

The answer is the frequency of the recessive allele will increase.

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What is the frequency of heterozygotes?

and the frequency of heterozygotes is 2pq = 2 x 99/100 x 1/100 = 2/100; Note that there are a lot of heterozygotes: 1/50, two hundred times more than there are individuals suffering from the condition. . For a rare disease, p is very little different from 1, and the frequency of the heterozygotes = 2q.

What is an example of allele frequency?

Example: assuming that in a human population, there are 100 individuals. Since each of them would have two alleles for a particular character (one allele inherited from the father, the other allele from the mother), the total number of genes in this population is 200 (=100 x 2). … Variant: allelic frequency.

What is the phenotype frequency?

Relative phenotype frequency is the number of individuals in a population that have a specific observable trait or phenotype. … Relative genotype frequency and relative allele frequency are the most important measures of genetic variation.

How do you find the frequency of heterozygotes in a population?

To determine q, which is the frequency of the recessive allele in the population, simply take the square root of q2 which works out to be 0.632 (i.e. 0.632 x 0.632 = 0.4).

What is major allele frequency?

In addition, the major allele, by definition, could have a frequency of 50.5%, in which case, although it is more frequent, it is only more frequent by 0.5%.

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