As soon as the sperm fertilizes the egg, ________ is fixed.
A)the relationship between heredity and environment
B)placement in the reaction range
C)the phenotype
D)the genotype

Question

Quizplus · Accepted Answer

The genotype of an organism is determined by its genes, which are inherited from its parents. As soon as the sperm fertilizes the egg, the genetic information from both parents combines to form a unique set of genes, which determines the individual's genotype. The phenotype, or the observable characteristics of an organism, is determined by both its genotype and environmental factors, and may change over time. Other factors, such as placement in the reaction range or the interaction between heredity and environment, are not immediately fixed at the moment of fertilization.

As Soon as the Sperm Fertilizes the Egg, ________ Is