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peachbee229Lv1
28 Sep 2019
Midphalangeal hair (hair on top of the middle segment of thefingers) is a common phenotype caused by a dominant allele,M. Homozygotes for the recessive allele, mm, lackhair on the middle segment of their fingers. In a particular groupof families in which both parents had midphalangeal hair(M--), 1853 of their children showed midphalangeal hair,whereas 209 children did not.
a)Find the approximate proportion ofthe children who had two heterozygous parents.
b)What are all the other parentalgenotypic combinations that gave rise to the other children?
Midphalangeal hair (hair on top of the middle segment of thefingers) is a common phenotype caused by a dominant allele,M. Homozygotes for the recessive allele, mm, lackhair on the middle segment of their fingers. In a particular groupof families in which both parents had midphalangeal hair(M--), 1853 of their children showed midphalangeal hair,whereas 209 children did not.
a)Find the approximate proportion ofthe children who had two heterozygous parents.
b)What are all the other parentalgenotypic combinations that gave rise to the other children?
Irving HeathcoteLv2
28 Sep 2019
