While examining a human cell that functions normally, you determine that it has 45 functional chromosomes and one chromosome that is almost completely inactive. You immediately decide that it is very likely that this cell ________.
A)came from a normal human female
B)is lacking a chromosome
C)is a gamete
D)will become cancerous if one or two more genes are mutated

Question

Quizplus · Accepted Answer

In normal human females, one of the two X chromosomes is inactivated in a process called X-inactivation, resulting in one functional X chromosome and one inactive X chromosome (Barr body), leading to 45 functional chromosomes.

While Examining a Human Cell That Functions Normally, You Determine