Two individuals with the same phenotype
A) Must be of the same genotype
B) Must have the same alleles at some genetic locus
C) Must be living in the same environment
D) May be different genotypes

Question

Quizplus · Accepted Answer

Phenotype refers to the observable characteristics of an organism, which can be influenced by its genotype (the genetic makeup) and the environment. Two individuals can have the same phenotype (e.g., both have blue eyes) but different genotypes (e.g., one could be homozygous for the blue eye allele while the other could be heterozygous, carrying one blue eye allele and one allele for another eye color). This means that the same phenotype can result from different genetic backgrounds, hence option D is correct.

Two Individuals with the Same Phenotype