Question

Which two statements correctly describe the heterochromia mutation in the passage?

A.
The mutation did not occur by chance.

B.
The mutation did not affect the genotype of the cells.

C.
The mutation was inherited from the person's parents.

D.
The mutation occurred after the formation of the embryo.

E.
The mutation will not be passed onto the person's offspring.

Answer 1

D and E.

Reason: The heterochromia described is a postzygotic (somatic) mutation that arose after the embryo formed (D). Because it is somatic and not present in the germline, it is not inherited from the parents and will not be passed to offspring (E). The mutation does change the genotype of the affected cells (so B is false), it was not inherited (C false), and mutations generally arise by chance (A false).