Explanation: Primary spermatocyte undergo meiosis and produces spermatids. Spermiogenesis is the process by which haploid spermatids modified to motile spermatozoa.

Explanation: Spermatids are connected by a cytoplasmic bridge, thus considered as functionally diploid and genetically haploid.

Explanation: Seminiferous tubule is the site of spermatogenesis while Vasa deference and epididymes help in sperm maturation.

Explanation: Interstitial cells or leyding cell are the sources of testosterone, located between the seminiferous tubule within a lobule.

Explanation: Oxyticin is released from the posterior pituitary due to the stimulants like sucking by the baby and is considered as milk ejection hormone.

Explanation: Whenever concentration of testosterone and ABP increases beyond the threshold level, inhibin inhibits the anterior pituitary and decreases the release of FSH and LH.

Explanation: FSH is Follicular Stimulating Hormone which stimulates the beginning of puberty and induces primary oocyte to complete its meiosis.

Explanation: Corpus luteum is the chief source of progesterone, which prepares a female for the gestation period by increasing the thickness of endometrium and also by increasing its vascularisation.

Explanation: Sperm acquire its motility in the epididymis after residing here for 18-24 hours.

Explanation: Seminal vesicle secretes spermatozoa activating substances like fructose, citrate, and prostaglandins.

Explanation: The pattern of cleavage in mammals is holoblastic (complete) and rotational. Rotational means first cleavage furrow is parallel to an animal, vegetal axis.