Human Reproductive System

Human sex is determined by chromosome combinations: females have XX and males have XY. When an X-bearing sperm fertilizes an X-bearing ovum (always X), the resulting zygote is XX and develops as female. Only when a Y-bearing sperm fertilizes the ovum does the result be XY (male).

 Epididymis is a part of male reproductive system and is a tightly coiled tube connecting the efferent ducts from each testicle to vas deferens

 Inguinal canal in anterior abdominal wall allows passage of spermatic cord in males and round ligament in females

Hematocele is an effusion of blood into the tunica vaginalis of testis.

Abnormal curvature of penis is observed in Peyronie's disease due to chronic inflammation of the tunica albuginea.

Kallmann syndrome is an example of secondary hypogonadism. 

Secondary vaginismus is often associated with childbirth trauma.

In meiosis, one diploid parent cell undergoes division to produce four haploid gametes. To produce 100 gametes, 100 divided by 4 equals 25 parent cells.

Muscle contractions are vigorous and towards uterus at this time.

This is the correct option as it is a false statement. 

The changes which occur at adolescence are controlled by hormones.

Innervation of the penis comes from the pudendal nerve, which is made up of the 2nd, 3rd and 4th sacral nerves. The penile nerve (also known as the dorsal nerve of the penis) is the deepest branch of the pudendal nerve.

The internal pudendal arteries serve as the penile blood supply by entering the penis dorsally and running deep into the tissues of the corpora cavernosa. The internal pudendal artery becomes the penile artery.

This is the correct option. 

This is the correct option.