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If two parents that are heterozygous (Aa) at a single locus give rise to offspring that are 25 percent AA, 50 percent Aa, and 25 percent aa, then all of the following are true EXCEPT:
(A) The parents are diploid organisms.
(B) The a allele is recessive lethal.
(C) The alleles assort independently.
(D) The gametes combine at random.
(E) The probability that a given gamete will receive allele A is one-hal