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If an organism with a recessive trait is crossed with an organism having a dominant trait but unknown genotype, what is this test called?

Answer and explanation

Correct answer: Test cross

A test cross is used to determine the genotype of an organism showing a dominant phenotype. The organism with the unknown genotype is crossed with a homozygous recessive organism. If all offspring show the dominant phenotype, the unknown parent is likely homozygous dominant; if recessive offspring appear, it is heterozygous. Therefore option B is correct. A involves two traits, C is reproduction within the same plant, and D is selection rather than a genotype-testing cross.

Related tags

Test CrossGenotypeMendelRecessive TraitHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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