A) crossing between two genotypes with recessive trait
B) crossing between two \[{{F}_{1}}\] hybrids
C) crossing the \[{{F}_{1}}\] hybrid with a double recessive genotype
D) crossing between two genotypes with dominant trait
Correct Answer: C
Solution :
The test cross involves the crossing of \[{{F}_{1}}\] hybrid with a double recessive genotypic parent. By test cross, the heterozygocity and homozygocity of the organism can be tested. Thus, the offspring will be 100% dominant, if the individual which crossed with recessive parent i.e., (tt) was homozygous dominant and ratio will be 50% dominant and 50% recessive if the individual was heterozygous dominant. In dihybrid test cross, ratio will be 1 : 1 : 1 : 1.You need to login to perform this action.
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