Human Reproduct...

Menstrual flow occurs due to lack of

The function of oxytocin is to help in

Which one of the following is initiated by secretion of Trophoblast

Which of the following layers in an antral follicle is acellular.

Assertion: Zona pellucida disappears when blastocyst reaches the uterus.

Reason: Role of a Zona  pellucida is to check the implantation of blastocyst at an improper site.

(A) If both Assertion and Reason are true and R is correct explanations of A

(B) If both Assertion and Reason are true and R is not the correct explanations of A

(C) If Assertion is true but Reason is false

(D) If both Assertion and Reason are false

Assertion: In humans, the gamete contributed by the male determines whether the child produced will be the male or female.

Reason: Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on X- chromosomes and some on Y- chromosome.

(A) If both Assertion and Reason are true and R is correct explanations of A

(B) If both Assertion and Reason are true and R is not the correct explanations of A

(C) If Assertion is true but Reason is false

(D) If both Assertion and Reason are false

The process of release of spermatozoa from the seminiferous tubules is ……

……….. Spermatozoa will be produced from 100 primary spermatocytes and ……..ova will be produced from primary oocytes ?

Which of these statements are true and false?

Statement A : Menarche is the beginning of menstruation at puberty in primates / human females at about 13 years of age.

Statement B : Menopause is the stoppage of menstruation and menstrual cycle at the age of 45 - 55.

Secretion of progesterone by corpus luteum is initiated by