Question

The genes a, b, and c are different genes that reside on the same chromosome. Genes a and b are 10 cM apart, b and c are 2 cM apart, and a and c are 8 cM apart. What is the order of these genes?

Answer 1

a-c-b

Step-by-step explanation:

• It is given that the three genes are present on the same chromosome.
• Out of them genes a and b are 10 cM apart so they are the farthest from each other.
• Gene c can lie between them according to the conditions given in the question. It will be 8cM apart from gene a and 2cM apart from gene b making the total distance as 10cm.
• Hence the final gene order will be a-c-b.