Assertion : Human chromosome have been studied through banding technique.
Reason : Banding technique is useful in studying chromosomal aberrations.

Options

A. If both the assertion and the reason are true and the reasons is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reson is false
D. If both the assertion and reason are false

Answer

A

Explanation

Chromosomes are stained with special fluroscent dyes that have differential affinity for different parts of the chromosomes . It brings about specific banding pattern. Bands are segments of stained chromosomes that appear lighter darker or stained as compared to adjacent parts, Banding technique of chromosome staining is highly useful in knowing various types of chromosomal aberrations or abnormalities like additions deletions and inversions.