In a certain population, the genotype of an individual can be represented by the following Punnett square: | Rr | Rr || rR | rR |. What is the most likely genotype of the offspring from a cross between two heterozygous individuals?

Core Concept

Based on the Punnett square, the most likely genotype of the offspring from a cross between two heterozygous individuals (Rr x Rr) is a 50% chance of both RR (homozygous dominant) and rr (homozygous recessive) genotypes. This is because the cross of two heterozygotes produces a 25% chance of each genotype (RR, Rr, rr). Option A is incorrect because the RR genotype is not as likely as the rr genotype. Option B is incorrect because the Rr genotype is not as likely as the rr genotype. Option C is incorrect because the rr genotype is not the only possible genotype.