Question

Lack of independent assortment of two genes is due to .............

• A. Recombination
• B. Crossing over
• C. Linkage
• D. Repulsion

Hint:

Linkage is the concept where genes located on the same chromosome are inherited together. The closer the genes are, the less likely recombination will occur between them.

Answer 1

The Correct Option is C

The lack of independent assortment of two genes is due to Linkage. When two genes are located close to each other on the same chromosome, they are inherited together, thereby violating the law of independent assortment.
(1) Recombination: Recombination can break linkage, leading to the independent assortment of genes. Hence, recombination does not cause the lack of independent assortment.
(2) Crossing over: Crossing over is a process during meiosis that exchanges genetic material between homologous chromosomes. While it can affect linked genes, it does not directly cause the lack of independent assortment.
(3) Linkage: This is the correct answer. Linkage occurs when genes are located close to each other on the same chromosome, and they are inherited together, preventing independent assortment.
(4) Repulsion: Repulsion refers to the situation where alleles for two genes are located on different chromosomes, but it is not related to the lack of independent assortment.
Conclusion: The correct answer is Option 3: Linkage as it is responsible for the lack of independent assortment of genes.