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Tell me? A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio of:

A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio of:

  • Option 1)

    1 : 2 : 1 :: Tall homozygous : Tall heterozygous : Dwarf

  • Option 2)

    1 : 2 : 1 :: Tall heterozygous : Tall homozygous : Dwarf

  • Option 3)

    3 : 1  Tall : Dwarf

  • Option 4)

    3 : 1 :: Dwarf : Tall

 
Answers (1)
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Conclusion from punnett square -

All F1 are tall and in F2 3/4th of the plants are tall.

- wherein

Thus, phenotypic ratio of 3/4th tall: (1/4TT + 1/2Tt) and 1/4th tt, i.e 3:1 ratio but genotypic ratio of 1:2:1

 

 


Option 1)

1 : 2 : 1 :: Tall homozygous : Tall heterozygous : Dwarf

This is correct option

Option 2)

1 : 2 : 1 :: Tall heterozygous : Tall homozygous : Dwarf

This is incorrect option

Option 3)

3 : 1  Tall : Dwarf

This is incorrect option

Option 4)

3 : 1 :: Dwarf : Tall

This is incorrect option

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