|MadSci Network: Genetics|
Hi Recently in an exam I got a question about a genetic disorder (human) where it said that the disorder was expressed for the homozygous trait (it did not state whether the expression was for the dominant or recessive alleles). It then asked the question if both parents were heterozygous what would the chance of the child having the disorder. I know in normal circumstances the disease would express for those who are either homozygous recessive or in some cases for the homozygous dominant trait and therefore be 25%. But is there ever a case that the disease would express in both homozygous dominant and recessive cases and therefore the chance of an offspring having it be 50%. I am wondering as the question did not need us to know the genetic nature of the disease? Many thanks.
Re: Can both homozygous forms be expressed together
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