Question
In which animal do haploid cells divide mitotically to produce gametes ?
This question was previously asked in
NEET UG Re-Exam 2026 Question Paper (21-Jun-2026)
The correct answer is
Male honeybees
Haploid Gamete Production in Male Honeybees
The question concerns the unique process where haploid cells divide mitotically to produce gametes. This biological phenomenon is characteristic of the haplodiploid sex-determination system found in certain insects, like honeybees.
Male Honeybee Reproduction
- Male honeybees, known as drones, develop parthenogenetically from unfertilized eggs. Consequently, they are haploid, having a chromosome number represented as '$n$'.
- The reproductive cells (germline cells) within the male honeybee are also haploid ('$n$').
- To produce sperm, which are the male gametes and must also be haploid ('$n$'), these haploid germline cells undergo mitotic division. Mitosis creates genetically identical copies, thus maintaining the haploid state necessary for gametes in this system.
Contrast with Diploid Reproduction
In contrast, most animals like male frogs, grasshoppers, and earthworms follow a diploid system ('$2n$'). In these organisms:
- Diploid germline cells ('$2n$') proliferate via mitosis.
- The production of haploid gametes ('$n$') requires meiosis, a process that reduces the chromosome number by half.
Therefore, the specific condition of haploid cells undergoing mitosis to form gametes is observed in male honeybees.
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