Biology

Human Reproductive System

786 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 biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

All copulations do not lead to fertilization and pregnancy because?

  1. All mating does not result in transport of sperm and ovum simultaneously at ampulla

  2. Survival duration of both sperm and ovum is same

  3. Number of sperms and ovum varies

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
All copulation does not lead to fertilization and pregnancy because all mating does not result in transport of sperm and ovum simultaneously at ampulla.
The ovum has to be present in the ampulla of fallopian tube, so when the sperm reaches, it fertilizes and causes pregnancy.
It is very important for sperm and ovum to be present at the same time in ampulla, to cause fertilization and pregnancy.
Correct Answer -[A] option.
Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

A new human individual develops from a cell called as gamete.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A gamete is a haploid cell that fuses with another cell during fertilization in organisms and results in the formation of a diploid zygote. This zygote is the earliest developmental stage of embryo form which the organism develops.
Thus, the correct answer is option B.

Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

The process of releasing of sperm by male organism during copulation is called as

  1. Ejaculation

  2. Insemination

  3. Fertilization

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

Ejaculation is the discharge of semen, usually carrying sperms from the male reproductive tract during copulation.
Insemination is the introduction of a sperm into a female for fertilization.
Fertilization is the fusion of male and female gametes.
Parturition is the action of giving birth to young ones.
Thus, the correct answer is option A.

Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

The first step in the process of fertilization is development of zygote 

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The first step of fertilization is the penetration of the sperm into the egg, followed by the fusion of nuclei. The development of the zygote occurs after fertilization is complete.

Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

In humans, successful fertilization takes place in

  1. Ovary

  2. Fallopian tube

  3. Uterus

  4. Cervix

  5. Vagina
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • During copulation (coitus) semen is released by the penis into the vagina (insemination). 
  • The motile sperms swim rapidly, pass through the cervix, enter into the uterus and finally reach the ampullary region of the fallopian tube.
  • The ovum released by the ovary is also transported to the ampullary region of fallopian tube where fertilisation takes place. 
  • So, the correct option is 'Fallopian tube'.
Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

On fertilization of egg nucleus with sperm nucleus 

  1. First maturation is completed

  2. Second maturation is completed

  3. Embryo is formed

  4. First polar body is formed
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When the egg nucleus and the sperm nucleus unites in the fallopian tube, it results in fertilization. And it results in the production of zygote or fertilized egg. Maturation is completed during the the gametogenesis (before the formation of egg / sperm) and the polar body is also formed during this process.
Thus, the correct answer is option C.

Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

On fertilization of egg nucleus with sperm nucleus

  1. Second maturation is completed

  2. Zygote is formed

  3. First polar body is formed

  4. First maturation is completed
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fertilization occurs when the nucleus of both, a sperm and an egg fuse to form a diploid cell, known as a zygote. A zygote is a diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum. An organism in the early stages of growth and differentiation, from fertilization to the beginning of the third month of pregnancy (in humans) is called as an embryo, after that, an embryo is called a fetus.

Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

Fertilization of ovum occurs in

  1. Fimbriae of oviduct

  2. Isthmus of oviduct

  3. Ampulla of oviduct

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

During copulation, semen is released by the penis into the vagina. The motile sperms swim rapidly, pass through the cervix, enter into the uterus and finally reach the junction of the isthmus and ampulla of the fallopian tube. the ovum released by the ovaries also transported to the ampullary-isthmus junction where fertilization takes place.

So, the correct option is 'Ampulla of oviduct'.

Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

In human beings, the correct sequence of events during reproduction is

  1. Gamete formation, fertilisation, zygote, embryo

  2. Embryo, zygote, fertilisation, gamete formation

  3. Fertilisation, gamete formation, embryo, zygote

  4. Gamete formation, fertilisation, embryo, zygote
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sexual reproduction is the process wherein gametes both from male and female fuse together to give rise to a new progeny.
Steps involved in sexual reproduction :

  • Male gametes are produced in male reproductive organ by the process called spermatogenesis in semeniferous tubules in gonads and female gametes are produced in female reproductive organ by the process called oogenesis in the ovaries. This process is called gametogenesis.
  • The sperm (male gamete) enters the ovum (female gamete) by rupturing the cell wall of ovum and releases its chromosomal material in the ovum. This process is called fertilization. Wherein the egg is fertilized by a sperm.
  • Fertilisation process brings together two sets of chromosome, one from female and one from male. Thereby forming a diploid cell called zygote. Hence called zygote formation.
  • The newly formed zygote undergoes many cycles of cell division passing the stages from morula, blastula and giving rise to a multicellular structure called embryo through the process called embryogenesis.

Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

Which of the following statements about reproduction in the human being is correct?

  1. Fertilisation takes place in ovary.

  2. Fertilisation takes place in the testes.

  3. During fertilisation egg moves towards the sperm.

  4. Fertilisation takes place in the human female (oviduct).
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fertilization that takes place inside the female body is called internal fertilization. In human fertilization takes place in the oviduct. During fertilization motile sperm moves towards egg and fuse to form the zygote. Thus, the correct answer is option D.