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Law of Segregation

Tallness T- i...

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%’.

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