Question

The probability of a cross-over occurring between two genes on the same chromosome is

• A. Unrelated to the distance between them
• B. Increased if they are closer together on the chromosome
• C. Increased if they are farther apart on the chromosome
• D. None
  

Answer 1

Answer: (C)

Increased if they are farther apart on the chromosome

The probability of a crossover between two genes is proportional to the distance between the two genes. That is, the greater the distance between the two genes, the greater the probability that a crossover will occur between them during meiosis.

So, the correct answer is 'Increased if they are farther apart on the chromosome'.