Which of the following statements is TRUE? A) The genotype is the physical appearance of a trait. B) Alleles, genes, and loci are different names for the same thing. C) The phenotype of a dominant allele is never seen in the F₁ progeny of a monohybrid cross. D) A testcross can be used to determine whether an individual is homozygous or heterozygous for a dominant allele.

Question

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A testcross involves crossing an individual with a dominant phenotype with a homozygous recessive individual to determine if the dominant phenotype is due to a homozygous or heterozygous genotype.

Which of the Following Statements Is TRUE