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

Double fertilisation means the fusion of

  1. one male gamete with the egg and the other with the antipodal cell

  2. one male gamete with the egg and the other with the secondary nucleus

  3. one male gamete with the egg and other with the synergids

  4. two male gametes with an egg
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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Multiple choice

Which of the following statements is incorrect?

  1. Zygote is formed by the fusion of male and female gametes.

  2. Male germ cell is motile.

  3. Female germ cell stores food and is large in size.

  4. Female germ cell has XY sex chromosomes.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Female germ cell possesses XX chromosomes, whereas male germ cell contains XY chromosomes.

Multiple choice

How much should the temperature be in the scrotum for sperm formation?

  1. Slightly higher than the body temperature

  2. Lower than the body temperature

  3. Much higher than the body temperature

  4. Equal to the body temperature

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The formation of germ cells or sperms takes place in the testes. These are located outside the abdominal cavity in scrotum because sperm formation requires a lower temperature than the normal body temperature.

Multiple choice

Ovum is fertilised in

  1. Vagina

  2. Uterus

  3. Fallopian tube

  4. Ovary

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

sperm fuse with ovum in fallopian tube to form a zygote

Multiple choice

At which stage of development is ovum released from ovaries?

  1. Primary oocyte

  2. Secondary oocyte

  3. Tertiary oocyte

  4. Zygote

  5. Quaternary stage
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The tertiary follicle changes into the mature follicle or Graafian follicle. The secondary oocyte forms a new membrane called zona pellucida surrounding it. The Graafian follicle now ruptures to release the secondary oocyte (ovum) from the ovary by the process called ovulation.

Multiple choice

Oocyte is liberated from ovary under the influence of LH completing

  1. meiosis and before liberating polar bodies

  2. meiosis I and before liberating polar bodies

  3. meiosis I and before the completion of meiosis II

  4. meiosis I and after the release of polar body
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oocyte is liberated from ovary under the influence of LH completing meiosis I and before the completion of meiosis II.

Multiple choice

Behavioral studies on animals have shown that there is relationship between mechanism of reproduction and male parental care (protecting eggs or the young ones). In aquatic invertebrates, fishes and amphibians for example, the species that practice internal fertilization rarely show male parental care while a majority of species that practice external fertilization tend to exhibit male parental care. This is likely due to

  1. the male sex in species that practice internal fertilization are unable to defend against the predators

  2. the male sex in species that practice internal fertilization live on female as parasite

  3. the fact that the females of species that practice external fertilization die soon after laying the eggs

  4. the certainty of paternity in species that practice external fertilization and this behavior is reinforced over generation by natural selection
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology reproduction in humans twins reproduction and modern technology post fertilization events

Identical twins will be produced, when

  1. One spermatozoan fertilizes two ova.

  2. One ovum is fertilized by two spermatozoa.

  3. Two eggs are fertilized.

  4. One fertilized egg divides into two blastomeres and they become separate.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

One fertilized egg (ovum) splits and develops two babies with exactly the same genetic information. They are known as identical twins. In this case, one fertilized egg divides into blastomeres and they become separate. The self-contained halves then develop into two babies, with exactly the same genetic information. 

Multiple choice biology reproduction in humans twins reproduction and modern technology post fertilization events

Fraternal twins in humans are produced when

  1. Two sperms fertilize an ovum and the first two blastomeres separate from each other

  2. One sperm fertilizes an ovum and the first two blastomeres separate from each other

  3. Egg develop parthenogenetically and first two blastomeres separate from each other

  4. Two ova are fertilized simultaneously
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fraternal twins are also called as 'dizygotic'. This means there is fertilization of two seperate eggs(ova) by two individual sperms simultaneously. They are implanted in the uterine wall at the same time. They usually develop in two separate amniotic sacs. They are also called as 'biovular' since two eggs form two zygotes.
So, the correct is answer is 'Two ova are fertilized simultaneously'.

Multiple choice biology for the continuity of generation reproductive systems different stages of growth reproductive system in humans

Consider the following three statements related to the human male reproductive system and select the correct option stating which ones are true (T) and which ones are false (F).


(i) The middle piece of spermatozoon is also termed as the powerhouse of the spermatozoon.
(ii) Vas deferens joins a duct from the seminal vesicle and forms vasa efferentia.
(iii) Semen is a collection of secretions from the seminal vesicles, prostate gland and Cowper's glands and sperms from testes.

  1. (i) - T, (ii) - F, (iii) - T

  2. (i) - F, (ii) - F, (iii) - T

  3. (i) - T, (ii) - T, (iii) - F

  4. (i) - F, (ii) - T, (iii) - T
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement (i) is true as the middle piece contains mitochondria (powerhouse). Statement (ii) is false because the vas deferens joins the seminal vesicle duct to form the ejaculatory duct, not vasa efferentia. Statement (iii) is true as semen is a mixture of fluids from these glands and sperm.