Question

enlist any four factors responsible for genetic variation​

Answer 1

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● mutation

● random mating between organisms

● random fertilization

● crossing over (or recombination) between chromatids of homologous chromosomes during meiosis.

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Answer 2

Factors responsible for genetic variation are genetic flow, gene mutations, genetic recombination, and genetic drift.

1. Gene Flow: The transfer of different types of genes amongst the population is called gene flow.

2. Gene Mutations: These are also called point mutations. There will be variation in the chemical structure of the genes, these types of genes are called gene mutations.

3. Genetic recombination:  It is defined as the rearrangement of DNA sequences by the method of breaking and rejoining the chromosomes present.

4. Genetic Drift: There is the occurrence of random fluctuations amongst the number of genes of a population. This is referred to as genetic drift.