EvolutionMedium
Question
Mating of an organism to a doule recessive in order to determine whether it is homozygous or heterozygous for a character under consideration is called
Options
A.reciprocal cross
B.test cross
C.dihybrid cross
D.back cross
Solution
In genetics a test cross, first cross, first introduced by Mendel is used to determine if an individual exhibiting a dominant trait is homozygous or heterozygous for that trait. Test crosses involve breeding the individual in question with another indivial that expresses a recessive version of the same trait. If all offspring display the dominant phenotype the individualin question is homozygous dominant; if the offspring display both dominant and recesive phenotypes then the individual is heterozygous.In some sources, the “test cross†is defined as being a type of back cross between the recessive homozygote and F1 generation.
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