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Which of the following statements correctly describes the process of sperm formation in the male reproductive system?

1. (a) The human male reproductive system is composed of several organs involved in reproduction. In a diagram of the male reproductive system, the labels A, B, C, and D correspond to vas deferens, seminal vesicle, prostate, and bulbourethral gland, respectively.
2. (b) On the side of the egg opposite to where the sperm enters, the outer region of the egg lightens in color, forming a crescent-shaped area called the grey crescent.
3. (c) Leydig cells, also known as interstitial cells, are located in the testes and are responsible for producing the male hormone testosterone.
4. (d) In the testes, immature male germ cells (2n) undergo meiosis to increase in number. Certain spermatogonia (2n), referred to as primary spermatocytes, divide through meiosis to create secondary spermatocytes (n). These secondary spermatocytes then undergo a second meiotic division to form spermatids, which mature into sperm cells (spermatozoa) through a process called spermiogenesis.

Correct answer: (d) In the testes, immature male germ cells (2n) undergo meiosis to increase in number. Certain spermatogonia (2n), referred to as primary spermatocytes, divide through meiosis to create secondary spermatocytes (n). These secondary spermatocytes then undergo a second meiotic division to form spermatids, which mature into sperm cells (spermatozoa) through a process called spermiogenesis.

Solution

Option D correctly describes the process of spermatogenesis, including the meiotic divisions and transformation of spermatids into spermatozoa. The other options are either unrelated or incorrect in the context of the male reproductive system.

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