Question

Describe chromosomal theory of sex determination.

Answer 1

• A sex-determination system is a biological system that determines the development of sexual characteristics in an organism.
  
• The chromosome theory of sex determination proposed by McClung.
• According to this theory, chromosomes play a major role in determination of sex.
• In diploid organisms, a pair of chromosomes determines the sex of individual.
• They are called the sex chromosomes or allosomes or heterosomes.