In addition to interactions among genes, and between genotype and environmental influences, another crucial factor in the relationship between genotype and phenotype is:
A)the fact that gene expression is inflexible and unresponsive to internal factors.
B)that genes can mutate or spontaneously change from one generation to the next.
C)that because of the blood-brain barrier, teratogens such as exposure to radiation or chemical toxins do not affect the genotype or damage DNA.
D)the fact that the vast majority of genes in the human genome are never expressed.

Question

Quizplus · Accepted Answer

Mutations can occur spontaneously or as a result of external factors such as exposure to radiation or chemicals. These changes can alter the genetic code and potentially impact the phenotype.

Note: answers A, C, and D are not correct because they are either incorrect statements or do not directly relate to the relationship between genotype and phenotype.

In Addition to Interactions Among Genes, and Between Genotype and Environmental