Q164 / 180 · NEET 2018 · Zoology

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

i. Dominance
ii. Co-dominance
iii. Multiple alleles
iv. Incomplete dominance
v. Polygenic inheritance

  • A
    ii, iv and v
  • Correct answer
    B
    i, ii and iii
  • C
    ii, iii and v
  • D
    i, iii and v

Solution

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 -( IAI B)- a form of dominance wherein 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 alleles- IA, IB & IO - 3-different allelic forms of a gene.

Hence, the correct answer is option: 'B'.

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