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  4. A dihybrid for qualitative trait is crossed with homozygous recessive individual of its type, the phenotypic ratio is

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Q. A dihybrid for qualitative trait is crossed with homozygous recessive individual of its type, the phenotypic ratio is

AMUAMU 2009

Solution:

When the $F _{1}$ individuals are crossed with its pure recessive parent, the cross is called test cross. The result of it, is always $1: 1$ in monohybrid cross and $1: 1: 1: 1$ in dihydrid cross.