The genotypes of a plant variety were TtHh, T | vedclass

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(D) dihybrid test cross involves crossing a dihybrid individual $(TtHh)$ with a homozygous recessive individual $(tthh)$.According to the law of indep

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$TtHh 	imes tthh$

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(D) dihybrid test cross involves crossing a dihybrid individual $(TtHh)$ with a homozygous recessive individual $(tthh)$.According to the law of independent assortment,the gametes produced by $TtHh$ are $TH, Th, tH,$ and $th$ in equal proportions.The homozygous recessive parent $(tthh)$ produces only one type of gamete,which is $th$.When these gametes fuse,the resulting offspring genotypes are $TtHh, Tthh, ttHh,$ and $tthh$ in a ratio of $1 : 1 : 1 : 1$.This corresponds to the phenotypes: Tall-Hairy,Tall-Smooth,Dwarf-Hairy,and Dwarf-Smooth in a $1 : 1 : 1 : 1$ ratio.

The genotypes of a plant variety were $TtHh, Tthh, ttHh$ and $tthh$,where $T =$ tallness and $H =$ hairy stem. Which one of the following crosses would produce progeny giving a phenotypic ratio approximately $1 : 1 : 1 : 1$?

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