How many types of genotypes are produced in t | vedclass

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(A) In a dihybrid cross,two pairs of contrasting traits are considered (e.g.,$AaBb 	imes AaBb$).According to the law of independent assortment,the ph

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$9$

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(A) In a dihybrid cross,two pairs of contrasting traits are considered (e.g.,$AaBb 	imes AaBb$).According to the law of independent assortment,the phenotypic ratio is $9:3:3:1$.The genotypic ratio for a dihybrid cross is $(1:2:1) 	imes (1:2:1) = 1:2:1:2:4:2:1:2:1$.Counting these distinct combinations,we find that there are $9$ different types of genotypes produced in the $F_2$ generation.

How many types of genotypes are produced in the $F_2$ generation obtained from a dihybrid self-cross?

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