Question

A man is a carrier for Wilson's disease (Aa) and Rotor syndrome (Rr). Assume the genes involved in these two disorders are both on chromosome 13 (a non-sex chromosome). Below are possible representations of his genotype (labeled #1, #2, and #3). Which of them could be correct?
A. #1 only
B. #2 only
C. #3 only
D. #2 and #3 only
E. #1, #2 and #3

Answer 1

Answer:

The correct answer is "#2 and #3 only"

Explanation:

A and a are alleles, and R and r are alleles.  Alleles of a gene are found at the same locus on homologous chromosomes. Every pair of the alleles  depicts the genotype of a particular gene. Homozygous genotype occurs when two similar alleles at same locus and heterozygous in case of two nonidentical alleles. Due to the alleles there occurs a change in the appearance.  An alleles create differences in gene.