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  • Answer please! F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1: 2: 1. It represents a case of:

F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1: 2: 1. It represents a case of:

  • Option 1)

    Co-dominance

  • Option 2)

    Dihybrid cross

  • Option 3)

    Monohybrid cross with complete dominance

  • Option 4)

    Monohybrid cross with incomplete dominance

 

Answers (1)

 

The 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 the genotypic ratio of 1:2:1

 

 fig 1

 

Monohybrid cross with incomplete dominance shows both genotypic and phenotypic ratio as same (1 : 2 : 1).


Option 1)

Co-dominance

Incorrect option

Option 2)

Dihybrid cross

Incorrect option

Option 3)

Monohybrid cross with complete dominance

Incorrect option

Option 4)

Monohybrid cross with incomplete dominance

correct option

Posted by

Vakul

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