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Gene frequency and genotypic frequency.

The proportion of one particular type of allele to the total of all alleles at this genetic locus in a breeding population is known as gene frequency or allele frequency.

The proportion of frequency of any particular genotype among the inviduals of a population is known as genotype frequency.

If any population of 200 individuals consists of 20 BB, 40 Bb and 140 bb individuals.

Genotypic frequencies of BB or f (BB) is 20/200= 0.1

Genotypic frequency of Bb or f (Bb) is 40/200= 0.2

Genotypic frequency of bb or f(bb) is 140/200= 0.7

The frequecny of B gene or f (B) will be 0.1 (from BB) + 0.1 (from Bb) = 0.2.

The generalized expression of allele B is f (B)= f (BB) + 1/2 f (Bb).

Related posts:

  1. Allele, Recessive allele, Dominant allele, Back cross
  2. Hardy-Weinberg equilibrium
  3. Genotype and Phenotype
  4. Inherited cancer and two-bit hypothesis of Knudson

This entry was posted on Friday, March 27th, 2009 at 5:19 pm and is filed under Genetics. You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.

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