Which of the following is heterozygous for tw | vedclass

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(D) heterozygous individual for two pairs of alleles (dihybrid) must have two different alleles for each of the two genes,represented as $AaBb$. In th

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$TrtR$

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(D) heterozygous individual for two pairs of alleles (dihybrid) must have two different alleles for each of the two genes,represented as $AaBb$. In the given options,$TrtR$ can be written as $TtRr$,which contains two different alleles for the first gene ($T$ and $t$) and two different alleles for the second gene ($R$ and $r$). Therefore,$TrtR$ is heterozygous for two pairs of alleles.

Which of the following is heterozygous for two pairs of alleles?

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