Question
Explain the terms: (a) Hybrid (b) Test cross (c) Back cross.
Solution
(a) Hybrid: It is an organism derived from a cross between two genetically different organisms.
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(b) Test cross: It is a cross between an individual having a dominant trait and the parent possessing recessive trait in order to know the homozygous or heterozygous nature of the dominant trait. The offspring will be 100% dominant if the individual was homozygous dominant. The ratio will be 50% dominant and 50% recessive (1 : 1) in case the individual is hybrid or heterozygous for the dominant trait.
(c) Back cross: It is a cross between hybrid and one of its parents.
