Question

Given below are three statements (A - C) each with one or two blanks. Select the option which correctly fills up the blanks in the below given statements.

A. Coat colour in rabbit is an example of _____i_____.

B. Male humans having “A” blood group must have a genotype _____ii___ or ___iii___.

C. Himalayan pattern of coat colour in rabbits is determined by ___iv____ allele.

• A. i - Codominance
  ii – $I^A{I}^A$
  iii – $I^A{I}^B$
  iv - C
• B. i - Multiple allelism
  ii - $I^A{I}^A$
  iii - $I^A{I}^O$
  iv - $C^h$
• C. i - Multiple allelism
  ii - $I^A{I}^A$
  iii - $I^A{I}^O$
  iv - $C^{\mathrm{ch}}$
• D. i - Codominance
  ii - $I^A{I}^A$
  iii - $I^A{I}^O$
  iv - c

Answer 1

The correct option is B

i - Multiple allelism
ii - $I^A{I}^A$
iii - $I^A{I}^O$
iv - $C^h$

Coat color in rabbits is controlled by a series of multiple alleles. Infact there are four alleles, and each one is expressed with a different phenotype.

When an individual has “A” blood group it can be due to either of the two genotypes, i.e $I^A{I}^A/I^A{I}^O$ where allele $I^A$is dominant over $I^O$.

Himalayan type coat of rabbits is white except for extremities (nose, ears, feet and tail). The gene for Himalayan coat is represented by $C^h$ allele.