Which of the following statements about the relationship between genotype and phenotype is true?
A) A given genotype always produces a specific phenotype.
B) Genotypes alone determine all phenotypes.
C) A particular phenotype can be produced by more than one genotype.
D) Dominance makes the study of the genetic basis of natural selection easy.
E) None of the above

Question

Quizplus · Accepted Answer

Different genotypes can produce the same phenotype, this is known as genetic heterogeneity. For example, there are different genetic mutations that can lead to cystic fibrosis, but they all result in the same set of symptoms. Also, environmental factors can influence the expression of a phenotype, so even individuals with the same genotype may have different phenotypes. Dominance does not necessarily make the study of the genetic basis of natural selection easy, as there are cases where an individual's fitness is determined by a recessive allele or by interactions between multiple genes.

Which of the Following Statements About the Relationship Between Genotype