Question

what are the phenotypic and genotypic ratios of a) test cross and b ) back cross and also define them​

Answer 1

F  

1

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 generation produced by monohybrid crossing --> Tt

Test cross:                   Tt                          x      tt

Gametes:                    T, t                                  t

Offspring:                   Tt, tt

Phenotypic ratio:        1 : 1

Genotypic ratio:          1 : 1        

So, option A is correct here.  The genotypic ratio describes the number of times a genotype would appear in the offspring after a test cross. For example, a test cross between two organisms with same genotype, Rr, for a heterozygous dominant trait will result in offspring with genotypes: RR, Rr, and rr.Genotypic ratios: The ratio of different genotype in the offspring from a genetic cross. E.g 1:2:1. ▪ Phenotypic ratios: The ratio of different phenotypes in the offspring from a genetic cross.

Answer 2

Answer:

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