Principle Of Inheritance And Variation Question 566
Question: Tizo and Levan’s contribution is very significant because they [CBSE PMT 1993]
Options:
A) Gave the number of human chromosomes
B) Pointed out mutational changes
C) Identified Barr bodies
D) Detected sex linkage
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Answer:
Correct Answer: A
Solution:
Tizo and Levan (plant cytologists) in 1956 enabled the human geneticists to ascertain the correct chromosome number.