Question

Heterozygous organisms have one dominant and one recessive allele (e.g., Aa).


F.
False


T.
True

Answer 1

F. False

"Heterozygous" simply means an organism has two different alleles at a locus (e.g., Aa). Those two alleles may show a dominant–recessive relationship, but they can also show incomplete dominance, codominance, or other interactions, so heterozygous does not always imply one allele is dominant and the other recessive.