Biology · PYQ NEET UG 2019(1)

What map unit (Centimorgan) is adopted in the construction of genetic maps?

A
A unit of distance between two expressed genes on chromosomes, representing 1% cross over.
B
A unit of distance between genes on chromosomes, representing 50% cross over.
C
A unit of distance between two expressed genes, representing 10% cross over.
D
A unit of distance between two expressed genes, representing 100% cross over.

View Answer & Solution

Correct answer · Option A

A unit of distance between two expressed genes on chromosomes, representing 1% cross over.

One centimorgan (cM) corresponds to a 1% recombination frequency (crossing over) between two linked genes on a chromosome.