Question

How do I Calculate allele frequency?

Answer 1

Hint: A test cross is determined whether an individual is homozygous or heterozygous dominant. In a test cross, an individual bred with another individual that is homozygous for the recessive trait and offspring of the test cross is determined. If any offspring express the recessive trait, then it will be heterozygous for the dominant allele. If offspring express a dominant trait, the individual will be homozygous for the dominant allele.

Complete answer-
An allele frequency is calculated by the number of times the allele is observed in a population by total number of copies and alleles are at that particular genetic locus in the population. The frequencies of alleles can be calculated in percentage or fraction.
Allelic frequency is calculated by dividing the number of alleles that are observed in a population by the total number of copies at that specific genetic locus. Allele frequencies can be shown in decimal or fraction.
Allelic are the diversity which shows variations in population and also indicate genetic drift from those new mutations which have been introduced into any habitat. To calculate the allelic frequency, one should know the hardy Weinberg principle.
Hardy -Weinberg principle stated the relationship in the genetic variation of population and remain constant from one generation to another by absence of disturbing factors.

Note:
The formula used for calculation of hardy equilibrium is $p$ + $q$ = $$1$. The principle is important as it helps to study the genetic changes a species or population undergoes over a time period. In plants it follows the random mating population which is not affected by evolutionary processes. Here both genotype and frequencies remain the same.