Question

(i) Describe the events of spermatogenesis with the help of a schematic diagram.

Hint:

Spermatogenesis ensures the production of haploid sperm cells essential for sexual reproduction.

Answer 1

\begin{figure}[H] \centering \includegraphics[width=0.8\textwidth]{Screenshot 2025-01-16 182535.png} % Replace 'path_to_your_image.png' with the actual file path \caption{Schematic diagram showing the process of spermatogenesis.} \label{fig:spermatogenesis} \end{figure} Spermatogenesis occurs in the seminiferous tubules of the testes and involves the production of haploid sperm cells from diploid spermatogonia. The process includes three main phases: \begin{itemize} \item Multiplication Phase: Diploid spermatogonia (stem cells) undergo mitosis to increase their number. Some spermatogonia differentiate into primary spermatocytes. \item Growth Phase: The primary spermatocytes grow in size and prepare for meiosis. \item Maturation Phase: Primary spermatocytes undergo meiosis I to form two haploid secondary spermatocytes. These then undergo meiosis II, producing four haploid spermatids. \end{itemize} Spermatids undergo spermiogenesis, transforming into mature spermatozoa. Sertoli cells provide structural and nutritional support throughout this process. The entire cycle takes approximately 64–74 days in humans. % Quick tip