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Question

Tallness (T-) is dominant over dwarfness (tt) while red flower colour (R-) is dominant over white colour (rr). A plant with genotype TtRr is crossed with plant of genotype ttrr. Percentage of progeny having tall plants with red flowers is

A
25%
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B
50%
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C
75%
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D
100%
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Solution

The correct option is A 25%

An heterozygous tall plant with red flowers(TtRr) is crossed to homozygous dwarf plant with white flowers(ttrr). In the next generation tall plant with red flowers are 25%, tall plant with white flowers are 25%, dwarf plant with red flowers are 25%, dwarf plant with white flowers are 25% are formed.

So, the correct option is ‘25%’.
1125657_688133_ans_7e163c1435dc4633a7734291e93b1e86.jpg

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