Question
Which of the following statements are true with reference to the sex-determination in honeybees ?
A. An offspring formed from the union of a sperm and an egg, develops as a female (queen or worker).
B. An unfertilized egg develops as a male by parthenogenesis.
C. A male has half the number of chromosomes than that of a female.
D. Males produce sperms by meiosis.
E. Honeybees have a haplodiploid sex-determination system.
Choose the correct answer from the options given below :
This question was previously asked in
NEET UG Re-Exam 2026 Question Paper (21-Jun-2026)
The correct answer is
A, B, C and E only
Understanding Honeybee Sex Determination
Honeybees exhibit a unique sex-determination system known as haplodiploidy. This system dictates how males and females develop based on chromosome number.
Analysis of Statements
-
Statement A: True
Fertilized eggs, resulting from the fusion of sperm (from a male) and an egg (from a female), are diploid (possess '$2n$' chromosomes). These diploid individuals develop into females, specifically either queens or worker bees, depending on environmental factors like nutrition. -
Statement B: True
Unfertilized eggs are haploid (possess '$n$' chromosomes). These eggs develop into males (drones) through a process called parthenogenesis, which is the development of an embryo from an unfertilized egg. -
Statement C: True
Females are diploid ('$2n$'), having inherited chromosomes from both parents. Males are haploid ('$n$'), developing from unfertilized eggs. Therefore, a male bee has exactly half the number of chromosomes compared to a female bee. -
Statement D: False
Male bees are haploid ('$n$'). To produce sperm, their cells divide mitotically. Meiosis is a process that reduces the chromosome number, which is typically used by diploid organisms to produce haploid gametes. Since males are already haploid, they produce sperm through mitosis, not meiosis. -
Statement E: True
The sex-determination system in honeybees, where females are diploid ('$2n$') and males are haploid ('$n$'), is called haplodiploidy.
Conclusion
Based on the analysis, statements A, B, C, and E are true. Statement D is false.
Therefore, the correct option includes A, B, C, and E.
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