Question

Which of the following statements is not true of two genes that show 50% recombination frequency?

• A. if the genes are present on the same chromosome, they undergo more than one crossover in every meiosis
• B. the genes show an independent assortment
• C. the genes are tightly linked
• D. the genes may be on different chromosomes

Answer 1

The correct option is C

the genes are tightly linked

The correct option is C

Explanation for the correct option:

1. Linked genes are genes that are situated adjacent to one another on a chromosome.
2. Genetic linkage refers to the propensity for the related genes to be passed down jointly.
3. Genes that are near to one another tend to be more connected than genes that are farther apart.
4. The frequency of recombination will decrease with increasing linkage and vice versa.
5. Linkage thereby lowers the frequency of the hybrid. A 50% recombinant frequency indicates that the genes are present on the same chromosome but are far from one another, suggesting that more than one crossing may have occurred during each meiosis.
6. Due to their location on different chromosomes, they could also not be connected. There is an independent assortment in these genes.

Final answer: The genes are tightly linked is not true of two genes that show 50% recombination frequency.