Biology

Human Reproductive System

751 Questions

The human reproductive system covers the anatomy of reproductive organs, gamete production, fertilization processes, and reproductive technologies. This is a highly scoring area in biology sections of competitive exams. Use these questions to practice key concepts.

Fertilization processGamete productionReproductive organ functionsAssisted reproductive technology

Human Reproductive System Questions

Multiple choice

Testes are covered in a special sac called scrotal sac. What is the function of it?

  1. Spermatogenesis

  2. Sex differentiation

  3. To provide more space to internal organs

  4. To help in the independent functioning of kidneys

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Spermatogenesis is the meiotic division through which the sperms are formed. This occurs in scrotal sac. Its main function is to provide the ideal temperature required for sperm formation.

Multiple choice

Male gametes are formed from

  1. generative cell

  2. tube cell

  3. body cell

  4. prothallial cell
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In angiosperms, the pollen grain contains a generative cell and a tube cell. The generative cell undergoes mitosis to produce two male gametes.

Multiple choice

Double fertilization refers to fusion of

  1. two polar nuclei

  2. secondary nucleus with male gamete

  3. two eggs

  4. one male gamete with an egg and another with 2 polar nuclei
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Double fertilisation refers to the fusion of one male gamete with an egg and another with 2 polar nuclei.The two central cell maternal nuclei (polar nuclei) that contribute to the endosperm arise by mitosis from the same single meiotic product that gave rise to the egg. The maternal contribution to the genetic constitution of the triploid endosperm is double that of the embryo.

Multiple choice

Which of the following statements is incorrect?

  1. The spermatids differentiate into structurally different complex.

  2. Fertilization is a physico-chemical event.

  3. Cleavage transforms the fertilized ovum into a sphere of aggregated blastomeres.

  4. Cleavage divisions bring appreciable increase in the mass of protoplasm in the developing embryo.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cleavage divisions do not bring any appreciable increasse in the mass of protoplasm in the developing embryo, but there is a marked increase in the chromosomal DNA contents of its cells.