Assertion: Among the primates, chimpanzee is is the closest relative of the present day humans.
Reason : The banding pattern in the autosome numbers 3 and 6 of man and chimpanzee is remarkably similar.

Options

A. If both the assertion and the reason are true and the reason 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 reason is false
D. If both the assertion and reason are false

Answer

A

Explanation

Each human cell contain 46 chromosomes of these 44 are autosomes and 2 are sex chromosome. However the chromosome number is 48 for orangutan, Chimpanzee and gorilla.
Chromosomes are treated with specific stains to study the bonding pattern. This can be particularly noticed in chromosome 3 and 6. It was observed that bonding pattern is very similar between two.