Question

Researchers have outlined what happens when DNA in sex cells is affected by radiation.



image

Based on the evidence in the diagram, which argument supports the claim that inherited genetic variations may result from mutations caused by radiation?



A.
Damage to the single and double strands may be correctly repaired causing mutations only in the parent cells.

B.
Damage to the single and double strands may be correctly repaired, causing mutations that may be passed on to offspring.

C.
Damage to the bases and sugars, single strands, or double strands may not be correctly repaired, causing mutations only in the parent cells.

D.
Damage to the bases and sugars, single strands, or double strands may not be correctly repaired, causing mutations that may be passed onto offspring.

Answer 1

D

If radiation damages bases, single strands, or double strands in sex (germ) cells and the damage is not correctly repaired, those mutations become fixed in the gametes and can be transmitted to offspring, producing inherited genetic variation.