Question

If an individual has an extra chromosome in every one of its cells, what mutation must have occurred?

A. A non-disjunction mutation in the gamete of one of the parents
B. A non-disjunction in both gametes of the parents
C. A non-disjunction in one of the first gamete cells of the individual
D. A non-disjunction mutation in body cells of both parents

Answer 1

which do you think? Any why?

Answer 2

Akk, haven't done this in a while :p I do know that an extra chromosome would be a mutation so that probably narrows your answer down to either A or D

Answer 3

I'm leaning more towards A but I'm not 100% sure

Answer 4

yes it was A thank you :)

Answer 5

You're welcome :)