Consider a cross between tall and short plants in which all of the offspring are tall. This suggests that
A) the allele for tall is recessive.
B) the allele for tall is dominant.
C) the alleles for tall and short are codominant.
D) None of the above.

Question

Quizplus · Accepted Answer

If all of the offspring are tall and there were tall and short plants as parents, it indicates that the allele for tallness is dominant over the allele for shortness. If the allele for tall was recessive, then there would have been some short offspring (if both parents were heterozygous for tallness). If both alleles were codominant, then the offspring would have been a blend of both tall and short, rather than all tall.

Consider a Cross Between Tall and Short Plants in Which