A gray wolf's sperm contains

39 chromosomes. He mates with a female gray wolf.

How many chromosomes will there be in the resulting zygote?

The resulting zygote will have 78 chromosomes.

Step-by-step explanation:

The sperm and eggs are the sex cells of animals. These cells contain half the number of chromosomes compared to the number of chromosomes present in the somatic cell of that particular organism.

When the sperm and the egg cell unite to form a zygote, the 39 chromosomes in the wolf's sperm and the 39 chromosomes in the female wolf's egg will add up to male 78 chromosomes in the zygote.