Genteic variation in a population arises due to

Options

A. Mutations only
B. Recombination only
C. Mutations as well as recombination
D. Reproductive isolation and selection

Answer

**Step-by-Step Solution:**

1. **Understanding Genetic Variation**: Genetic variation refers to the differences in the genetic makeup of individuals within a population. This variation is crucial for evolution and adaptation.

2. **Identifying Causes of Variation**: The primary causes of genetic variation in a population are mutations and recombination.

3. **Role of Mutations**: Mutations are changes in the DNA sequence that can introduce new alleles into a population. These changes can occur spontaneously or due to environmental factors, leading to new traits.

4. **Role of Recombination**: During sexual reproduction, recombination occurs when genes are shuffled during the formation of gametes. This process can lead to new combinations of alleles, contributing to genetic diversity.

5. **Linkage and Variation**: Genes can be linked (located close together on a chromosome) or non-linked. Linked genes tend to be inherited together, which can limit variation. Non-linked genes can assort independently, allowing for more variation through recombination.

6. **Reproductive Isolation**: While reproductive isolation can limit gene flow between populations, it does not directly contribute to genetic variation within a population. Instead, it may preserve the existing variation.

7. **Conclusion**: Therefore, genetic variation in a population arises due to both mutations and recombination. The correct answer to the question is that genetic variation arises from "mutations as well as recombination."

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