Respuesta :
There are two phenotype possible in the offspring:
i) freckles and recessive trait for eyebrow shape i.e slender
ii) no freckles and recessive for eyebrow shape.
phenotype ratio is 2:2 0r 1:1
Explanation:
Data given:
freckles are dominant trait = Mm
no freckles are recessive = mm
the couple is having recessive trait for eyebrow shape = pp
The genotype of man = Mmpp
genotype of woman = mmpp
the cross between them is shown in punnet square below:
Mp mp
mp Mmpp mmpp
mp Mmpp mmpp
the phenotype expressed are
freckles and recessive trait for eyebrow shape i.e slender
no freckles and recessive for eyebrow shape.
phenotype ratio is
2:2
The ratio shows that there is 50% probability of offspring having either mother's or father's genotype and phenotype.
A two-gene cross that follows simple Mendelian inheritance of freckles and eyebrow shape between a woman with genotype Mmpp and a man with genotype mmpp.
woman man
Parent: Mmpp x mmpp
Mm x pp m x p
Mp mp x mp
Offspring: Mmpp mmpp
Two phenotypes are possible and in the ratio 1 : 1.
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