Question

The spermiogenesis is the process by which spermatozoa are formed from-
A. Spermatid
B. Spermatogonia
C. Primary Spermatocyte
D. Secondary oocyte

Answer 1

Gametogenesis is the process of formation of gametes. The gametes are called as sex cells produced from gonads. Gonadotrophic hormones that are follicle stimulating hormone (FSH) and luteinizing hormone (LH) of the pituitary gland regulate gametogenesis. Puberty attains at the age of $14 - 15$ in boys and $12 - 13$ in girls, which starts the development and growth of sexual organs or gonads.

Complete answer:
Option A: Spermatid- spermatids are embedded inside the primary spermatocyte. It is the final stage of process spermatogenesis. The spermatids are more or less circular cells containing nucleus, Golgi-apparatus, centriole and mitochondria. The process of spermiogenesis is traditionally divided into four stages- the Golgi phase, the cap phase, formation of tail and maturation stage.
Option A is the correct answer.
Option B: Spermatogonia- The formation of spermatids starts from primordial germ cells of testis which is separated into three phases- Multiplication phase, growth phase, Maturation phase. The spermatogonia is nothing but sperms.
Option B is not the correct answer.
Option C: Primary Spermatocyte- the process of maturation of primordial cells in the testis of male to form sperms or spermatozoa is known as spermatogenesis. As we know, the testis is formed of numerous tubular seminiferous tubules held together with connective tissue.
Option C is not the correct answer.
Option D: Secondary oocyte- secondary oocyte is no part of male reproductive system. It is part of the female reproductive system, the process of ovum formation.
Option D is not the correct answer.

Hence, Option A is the correct answer.

Note:
The sperms are a single specialized body modified for swimming and delivering its cell into the ovum to complete the act of fertilization. The sperm is extremely small and only few numbers in size but has a long tail or flagella. Male gametes vary in shape, size, and structure depending on the species. sperms can be divided into three parts- Head, middle piece and tail.