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Standard XII
Biology
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
  1. 25%
  2. 100%
  3. 75%
  4. 50%

A
75%
B
25%
C
50%
D
100%
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Solution
Verified by Toppr

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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