Question

Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce

• A. Spermatozoa
  
• B. Haploid spermatids
• C. Primary spermatocytes
  
• D. Spermatogonia
  
• E. Diploid spermatids
  

Answer 1

The correct option is B Haploid spermatids

Spermatogenesis
Spermatogenesis is the process of formation of sperm from spermatogonia in the testes of males.

Process of spermatogenesis
Spermatogenesis starts at puberty. It involves three phases:

1. Multiplication phase - Primordial germ cells present in the walls of the seminiferous tubule undergo mitosis to form more spermatogonia.
2. Growth phase - Some spermatogonia increase in cell size and volume and are referred to as primary spermatocytes. Both spermatogonia and primary spermatocytes are diploid and contain 46 chromosomes.
3. Maturation phase - Primary spermatocytes (46) undergo first meiotic division (reduction division) to produce two secondary oocytes. Thus, secondary spermatocytes have 23 chromosomes.
4. Secondary spermatocytes undergo a second meiotic division to form four spermatids (23).
5. Spermatids undergo cell differentiation and produce sperms.

Pictorial representation of spermatogenesis
Pictorial representation of the process of spermatogenesis: