Why do brothers and sisters not look exactly alike?
A) Each fertilized egg gets a random assortment of genes from the mother and the father.
B) While the egg cells all contain identical genetic material, the sperm cells have a great deal of variation.
C) Siblings have the same genetic combination, but their different environments when growing up cause them to look differently.
D) Boys tend to get more genetic material from their father, and girls tend to get most of their genetic material from their mother.

Question

Quizplus · Accepted Answer

Each fertilized egg (zygote) gets a random assortment of genes from the mother and the father, which leads to genetic variation among siblings.

Why Do Brothers and Sisters Not Look Exactly Alike