Robert and Susan are married and have 2 children, one son and one daughter. The children have different hair colors and eye colors. Which of the following statements explains these
differences in the children?
A) The environment affects these children before their birth
B) Hormone changes in a pregnant woman's body cause traits to develop differently in fertilized egg
C) Sexual reproduction produces fertilized egg that has a unique genetic make-up
D) There is a lack of variation in the genes of the parent's sex cells
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