Principles of Inheritance and Variation Question 68
68. There are three genes $a, b, c$. Percentage of crossing over between a and b is $20 \%, b$ and c is $28 \%$ and $a$ and $c$ is $8 \%$. What is the sequence of genes on chromosome?
[2002]
(a) b, a, c
(b) a, b, c
(c) a, c, b
(d) none of these
Show Answer
Answer : a
Hints & Solution
(a) $a-b=20 \%, b-c=28 \%, a-c=8 \%$
Percent crossing over between two genes is proportional to the distance between them.
