Tjio and Levan’s contribution is very significant because they __________ ?
ADetected sex linkage
BGave the number of human chromosomes
CPointed out mutational changes
DIdentified barr bodies
Correct answer
B. Gave the number of human chromosomes
Explanation
Gave the number of human chromosomes is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.