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Principles Of Inheritance And Variation

Question
CBSEENBI12002207
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Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as

  • genetic flow

  • genetic drift

  • random mating

  • genetic load

Solution

B.

genetic drift

Genetic drift is a random change in allele frequencies over the generations. It is brought by chance alone. Gene flow or gene migration is the physical movement of alleles into and out of a population.
The existence within the population of disadvantage alleles in heterozygous genotypes is known as genetic code.

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