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If an organism with the genotype ww is crossed with another ww organism, what would be the proportion of offspring that would be heterozygous?

Answer :

If an organism with the genotype ww is crossed with another ww organism, all the offspring will inherit the same genotype, which is ww. In this scenario, since both parents are homozygous for the recessive allele, there is no possibility for the offspring to be heterozygous.

The genotype ww indicates that both alleles for the particular gene are the same and recessive. In genetic terms, when two organisms with the same homozygous genotype are crossed, the resulting offspring will also be homozygous for that trait. This is because each parent can only contribute one allele, and in this case, both parents only have the recessive allele (w) to pass on.

Therefore, the proportion of offspring that would be heterozygous in this specific cross would be zero. All the offspring will be homozygous for the recessive allele (ww) just like their parents. This type of cross is referred to as a homozygous cross or a true-breeding cross, as it produces offspring with the same genotype as the parents.

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