Question

On which of the following chromosomal disorders are based on?

(a) Mutant allele and their defective products

(b) Imbalance in chromosome number and chromosome arrangement

(c) Mutant allele and chromosome arrangement

(d) Mutant allele and imbalance in chromosome number

The question was posed to me in class test.

My doubt stems from Inheritance and Variation Principles topic in portion Principles of Inheritance and Variation of Biology – Class 12

Answer 1

The correct choice is (b) Imbalance in chromosome number and chromosome arrangement

Explanation: The chromosomal disorders are the disorders that are based on the imbalance in chromosome number and chromosomal arrangement. The disorders which are due to the mutant allele and their defective products are known as Mendelian disorders.