What is test cross? Explain the significance of test cross.
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In genetics, a test cross, first introduced by Gregor Mendel, is used to determine if a group exhibiting a dominant trait is homozygous or heterozygous for that trait. More simply put, test crosses determine the genotype of an individual with a dominant phenotype.
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Answer:
A test cross is a type of breeding introduced first by Gregor Johan Mendel, in order to create a genetically engineered zygote and to understand to the genotype of such resultant organism.
Explanation:
A test cross is conducted between two parents each showing one phenotypic aspect and one aspect is recessive to the other. It was Mendel’s purpose to understand how the recessive gene is getting expressed in the F1 and F2 generation and the level of dominant gene expression in the F1 and F2 generations as well. The importance of this test lies in the fact that, for humans and animals and plants, an educated estimation can be made for disease-carrying recessive genes.
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