Question

Define heredity. Explain the
mechanism of hereditary changes.
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Answer 1

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⭕HEREDITY⭕

➡️➡️➡️➡️➡️Heredity is the biological process responsible for passing on physical traits from one generation to another.⬅️⬅️⬅️⬅️⬅️⬅️

⭕Hereditary changes can occur due to following changes: ⭕

➡️Natural Selection- One allele is fixed for the population as it provides a survival advantage.

➡️Genetic Drift- Sudden change in a small population due to which genetic variability is reduced.

➡️Mutations- Sudden and inheritable changes in the genetic material that gives rise to a new allele.

➡️Recombination- When the crossing over occurs during meiosis, the sequence of alleles changes on the chromosomes.

Answer 2

Answer:

The process by which physical or mental qualities pass from parent to child

Mechanism of Heredity:

Since higher organisms reproduce sexually and since the sperm and the egg are the only materials which pass from the parents to the offspring, the mechanism of heredity must be located in the gametes. ... The egg contains not only a nucleus but also some amount of cytoplasm.