A dog has a diploid chromosome number of 78.How many separate DNA molecules should be present at metaphase of mitosis?
A)39
B)78
C)156
D)4
E)None of the answers is correct.

Question

Quizplus · Accepted Answer

At metaphase of mitosis, each chromosome has replicated into two sister chromatids, but they are still joined together. Since a dog has 78 chromosomes, after replication, there would be 156 separate DNA molecules present (78 chromosomes x 2 sister chromatids per chromosome).

A Dog Has a Diploid Chromosome Number of 78