Question

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.

Answer 1

Answer:

d. a testcross can be used to determine whether an individual is homozygous or heterozygous.

Explanation:

In genetics, testcross, designed by Gregor Mendel, is designed to determine whether an individual exhibiting a dominant biological character is homozygous or heterozygous for that character. Simply put, a testcross determines the genotype of an individual with a dominant phenotype. Therefore, we can conclude that the right answer to your question is the letter D.