DNA replication occurs: a) at any time during cell division. b) immediately before prophase of mitosis. c) between the gap phases (G1 and G2) of interphase. d) during prophase of meiosis. e) during prophase of mitosis.

Explanation:

1. DNA replication is the process of DNA duplication in which one molecule of DNA is copied into two molecules with the help of DNA polymerase and various other enzymes in semi-conservative way.

2. Semi-conservative is the mode of DNA replication in which one strand is parental and one is newly synthesize in complementary way.

3. DNA replication occurs only once and once in each cell division.

4. DNA replication occurs in S phase ( phage between G1 and G2).

the match duh

explanation:

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.