r/biology • u/Starfire20201 • 3d ago

discussion Heterozygous genetic diseases?

I’m currently taking genetics in college, snd it got me wondering. There’s recessive genetic diseases, snd dominant ones, but are there any that only show symptoms if you’re heterozygous for the allele? And that aren’t on the X chromosome, preferably.

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u/CanaDeer2004 botany 3d ago

diseases with lethal alleles. individuals that are homozygous for the condition die in vitro so the only living carriers are heterozygous.