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1. The allele for hitchhikers' thumb (h) is recessive to straight thumb (H), If a man and his wife are both heterozygous recessives, perform a monohybrid cross and predict the possible genotypes of the offspring? Genotypes of parents: Genotypic ratio: Phenotypic ratio:​

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Answer:

Punnet square

H. h

H. HH. Hh

h. Hh. hh

Possible genotypes of offspring are: HH, Hh, hh.

Genotypes of parents: both are HH

Genotypic ratio: 1:2:1

Phenotypic ratio: 3:1 (3 straight thumb: 1 hitchhiker's thumb)

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