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  • Can someone explain If two persons with 'AB' blood group marry andhave sufficiently large number of children, thesechildren could be classified as 'A' blood group: 'AB' blood group: 'B' blood groupin 1:2:1 ratio. Moder

If two persons with 'AB' blood group marry and have sufficiently large number of children, these children could be classified as 'A' blood group: 'AB' blood group: 'B' blood group in 1:2:1 ratio. Modern technique of protein electrophoresis reveals presence of both 'A' and 'B' type proteins in 'AB' blood group individuals. This is an example of:

  • Option 1)

    Complete dominance

  • Option 2)

    Codominance

  • Option 3)

    Incomplete dominance

  • Option 4)

    Partial dominance

 

Answers (1)

As we discussed in concept

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)

Complete dominance

This option is incorrect.

Option 2)

Codominance

This option is correct.

Option 3)

Incomplete dominance

This option is incorrect.

Option 4)

Partial dominance

This option is incorrect.

Posted by

Vakul

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