Achondroplasia is an autosomal dominant form of dwarfism. people with achondroplasia are heterozygotes because carrying two copies of the dominant, mutant allele is fatal during embryogenesis. two people with achondroplasia decide to start a family.
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Ответ:
Two heterozygotes Aa will have 50% of chances to have a child with achondroplasia (AA), 25% of chances to have a recessive homozygote child (aa) and 25% of chance to concieve a child with two dominant mutant allele (AA):
Parental generation: Aa x Aa
F1 generation: AA, Aa, Aa, aa
Ratio: 1 : 2 : 1
Ответ:
the pic attached shows the stages of mitosis. hope it !