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

1:2:1

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3:1

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1:1:1:1

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9:3:3:1

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Solution

The correct option is C 1:1:1:1
The given cross is a test cross. The ratio for a test cross is always 1:1(monohybrid cross) and 1:1:1:1 for a dihybrid cross.
For example:
RrYy X rryy
(round, yellow) (wrinkled, green)
RrYy Rryy rrYy rryy
(Round, yellow) (round, green) (wrinkled, yellow) (wrinkled, green)

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The phenotypic ratio obtained by crossing Mendel’s $F_{1}$ dihybrid with the recessive parent is

The phenotypic ratio obtained by crossing the F₁ dihybrid with the recessive parent is

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