List of top Biology Questions on Human Reproduction

Student to attempt either option (A) or (B):
(A) (i) Explain why the milk produced by the mother during the initial days of lactation is considered to be very essential for the newborn infant.
(ii) What is the term used for the milk produced during the initial days of lactation?
OR
(B) Many children in the metro cities are suffering from a very common exaggerated response of the immune system to certain weak antigens in air.
(i) What is the term used for the above mentioned disease?
(ii) Name the main type of antibody produced by the immune system in response to this disease.
(iii) Which two main inflammation-causing chemicals are produced by the mast cells in such an immune response?

Consider the following:
A. The reductive division for human female gametogenesis starts earlier than that of male gametogenesis.
B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
C. The first polar body is associated with the formation of the primary oocyte.
D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.

Assertion (A): Cu-T, Cu-7 and LNG-20 are the most widely used copper-releasing IUDs.
Reason (R): Cu-ions in IUDs effectively suppress sperm motility and the fertilising capacity of sperms.

Present a neat, clean, and well-labelled diagram of an embryo inside the human uterus.

What is morula?

At which of the following stages is the embryo transferred to the fallopian tube?

Which of the following can lead to the development of brothers?

From which of the following do developing sperms get nutrition?

Where does capacitation of human sperms occur?

Which of the following human cells is motile?

Sertoli cells are controlled by which of the following hormones?

Which of the following cannot pass through placenta?

The opening of which of the following is known as blastopore?

Shyam and Radha are expecting their first child with Radha being in her second month of pregnancy with no complications. Shyam’s family has a history of cystic fibrosis while Radha’s family has a history of Down’s syndrome, leading to a concern that the baby may have one of these conditions.
(a) Suggest and explain a way of testing if their baby is at risk for any genetic disorders.
(b) In case of presence of one or both of the abnormalities and posing a risk to the mother’s health, mention one possible option for them to consider. Is that option safe for Radha at the current gestational age? Justify.
(c) Under what conditions is the process mentioned in (b) illegal?

Assertion (A): Saheli is the World’s first non-steroidal oral contraceptive pill.
Reason (R): It has been developed by National Institute of Immunology, New Delhi.

Estrogen is secreted by:

Amniocentesis is a technique that is used to:

Describe the changes in the ovary and the uterus as induced by the changes in the level of pituitary and ovarian hormones during menstrual cycle in a human female.