Discussion
The two different alleles of the same gene present in an individual are known as ______ alleles.
Answer: B
When the two alleles of a gene in an individual are different, they are called heterozygous alleles. An individual with Aa is heterozygous for the gene.
Homozygous alleles are identical, and homoduplex and heteroduplex are terms for DNA molecules, not for alleles.
In a heterozygote the two alleles of a gene are different, as in Tt, so the two forms of the gene differ. In a homozygote they are the same, as in TT or tt.
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