Question

In most mammals, the testes are located in scrotal sac for
A. Spermatogenesis
B. Sex determination
C. More space to visceral organs
D. Independent functioning of kidney

Answer 1

Testes are male reproductive organs which are involved in production of male gametes - sperms and scrotum is seen as a sac of skin which hangs from the body at the front of the pelvis.

Complete answer:
The testes are the male gonads, i.e. they are the primary Male reproductive organ. They have two very important functions: the production of the sperm and description of the hormone, particularly the male hormone testosterone.

The testes are from mobile organs. A typical man has to test is approximately 5cm long, 3cm wide and 2.5 cm thick. Weighing 10 to 15 gram each, the testes are suspended outside the body in the fleshy sac called the scrotum. The scrotum attaches to the body between the base of the penis and anus, that left testis lies slightly lower than the right.

The germ cells undergo mitosis and then forma a group of cells known as spermatogonia which are diploid cells. Spermatogonia undergoes mitosis and forms primary spermatocyte and then undergoes meiosis to form haploid spermatids. The spermatids are transformed into spermatozoa by the process of spermiogenesis.

Hence the correct answer is option A) Spermatogenesis.

Note: Each testicle consists of a series of a small tube or tubules that contain testosterone and sperm producing cells. Seminiferous tubules house germ cells, the 23 chromosome cells that man replicate to produce sperm.