Since John and Stan have the same genes, what must they be?
A) dizygotic twins
B) monozygotic twins
C) heterozygous
D) codominant

Question

Quizplus · Accepted Answer

Monozygotic twins are identical twins who come from a single fertilized egg which splits into two. Since John and Stan have the same genes, they must be monozygotic twins. Dizygotic twins, on the other hand, come from two separate eggs fertilized by two different sperm and are not identical. Heterozygous and codominant refer to genetic traits, but the question does not provide enough information to determine if John and Stan are heterozygous or codominant for any specific trait.

Since John and Stan Have the Same Genes, What Must