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Answer please! Which of the following characteristics represent 'Inheritance of blood groups' in humans ?a. Dominanceb. Co-dominancec. Multiple alleled. Incomplete dominancee. Polygenic inheritance

Which of the following characteristics represent 'Inheritance of blood groups' in humans ?

a. Dominance

b. Co-dominance

c. Multiple allele

d. Incomplete dominance

e. Polygenic inheritance

  • Option 1)

    b , d and e

  • Option 2)

    a , b and c

  • Option 3)

    b , c and e

  • Option 4)

    a , c and e

 
Answers (2)
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2

As we learnt in  

Dominance in different alleles of gene (I) -

Since humans are diploid, each person possesses any two of the three genes I allels.

- wherein

IA and IB are completely dominant over i, but when IA and IB are present together, they both express their own types of sugar and none is dominant over other. This is called co-dominance and RBCs have both A and B types of sugar

 

Co-dominance -

In F1 generation, when the offspring resembles both parents, then it is called co-dominance. 

- wherein

E.g., different types of red blood cells that determine ABO blood groups.

 

Dominance –( IAIO, IBIO )- the phenomenon whereby, in an individual containing two allelic forms of a gene, one is expressed to the exclusion of the other.

Codominance -( IAIB )- a form of dominance where in the alleles of a gene pair in a heterozygote are fully expressed. This results in offspring with a phenotype that is neither dominant nor recessive.

multiple allele- IA, IB & IO - 3-different allelic forms of a gene.


Option 1)

b , d and e

This is incorrect. 

Option 2)

a , b and c

This is correct.

Option 3)

b , c and e

This is incorrect.

Option 4)

a , c and e

This is incorrect.

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