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A compound heterozygote has two different alleles in the same locus, either in only one strand (cis phase) or in the 2 ones (trans phase). In the first case, necessarily the strand ( or gamete ) must come from one parent; in the second, each parent transmit only each mutated allele. In both cases if the alleles are identical ( by nature or by descent ) the recipient is a homozygote, not a heterozygote .

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βˆ™ 2008-11-21 23:17:17
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Q: Does compound heterozygote mean from one parent only or from both parents?
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What would a child's blood type be if one parent was b-negative and the other a-positive?

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