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Q.

Mismatch regarding the phenotypic ratios of offspring of following crosses is 

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a

tt xTT __1:1

b

Rr x Rr - 1:2:1(snap dragon )

c

YyRr  x yyrr __1:1:1:1(pea)

d

YyRr x yYrR - 9:3:3:1

answer is D.

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Detailed Solution

When homozygous tall plant crossed with dwarf plant , phenotypically all the offsprings produced   tall are.  Genotype of these offspring is Tt .

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