Target Exam

CUET

Subject

Biology

Chapter

Principles of Inheritance and Variation

Question:

Which one of the following sex determination systems is found in honey bee?

Options:

XY type

Z and W type

Haplodiploid type

XO type sex

Correct Answer:

Haplodiploid type

Explanation:

The correct answer is Option (3) → Haplodiploid type 

The sex determination in honey bee is based on the number of sets of chromosomes an individual receives. An offspring formed from the union of a sperm and an egg develops as a female (queen or worker), and an unfertilised egg develops as a male (drone) by means of parthenogenesis. This means that the males have half the number of chromosomes than that of a female. The females are diploid having 32 chromosomes and males are haploid, i.e., having 16 chromosomes. This is called as haplodiploid sex-determination system and has special characteristic features such as the males produce sperms by mitosis, they do not have father and thus cannot have sons, but have a grandfather and can have grandsons.