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Question


On crossing two heterozygous tall plants (Tt), a total of 500 plants were obtained in F1 generation. What will be the respective number of tall and dwarf plants obtained in the F1 generation?

A
375, 125
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B
250, 250
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C
475, 25
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D
350, 150
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Solution

The correct option is A 375, 125
  • The crossing between two heterozygous plants is as shown in the image:
  • The phenotypic ratio of a heterozygous monohybrid cross is 3:1 (Dominant: Recessive)
  • So, if plants obtained were 500, then the respective number of tall and dwarf plants will be 375 tall and 125 dwarf, as this 375:125 (Tall: Dwarf) represents the typical 3:1 phenotypic ratio.
So, the correct answer is option 'A'.

1400104_931398_ans_c2369722816240a79deb4f1a84720ab7.png

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