Question

What is heredity ? explain the mechanism of hereditary changes.​

Answer 1

Heredity is the transfer of characters and genes from one generation to next generation. The variations helps the individuals to evolve, more hereditary changes will lead to more variations and thus strong progeny. Mechanism: 1) Mating: During mating the fusion of male and female gametes take place.

Answer 2

Answer :

Heredity can be defined as the process of transmission of the characters from the parents to the offspring through the mode of reproduction .

Heredity changes can be occur due to following changes :

• Natural selection - The expression of the particular allele is more pronounced in a population as it provides survival advantage.
• Genetic drift - Sudden changes in a small population due to which genetic variability is reduced.
• Mutations - Sudden and inheritable changes in the genetic material that gives rise to the new allele.
• Recombination - When the crossing over occurs during meiosis, the sequence of alleles changes on the chromosomes.

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