Tizo and Levan's contribution is very significant because they [CBSE P

1.	Tizo and Levan's contribution is very significant because they [CBSE PMT 1993]
A.	Gave the number of human chromosomes
B.	Pointed out mutational changes
C.	Identified Barr bodies
D.	Detected sex linkage
Answer» B. Pointed out mutational changes

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Tizo and Levan's contribution is very significant because they [CBSE PMT 1993]

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