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

What happens during fertilization in humans after many sperms reach close to the ovum?

  1. Secretions of acrosome help one sperm enter cytoplasm of ovum through zona pellucida

  2. all sperms except the one nearest to the ovum lose their tails.

  3. cells of corona radiata trap all the sperms except one

  4. only two sperms nearest the ovum penetrate zona pellucida.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During the process of fertilisation of the male and the female gametes (i.e the sperm and the egg) in humans, the sperm cells reach the egg, binds through the corona radiata and reach the zona pellucida layer of the egg. Here a molecule on the sperm binds with a glycoprotein in the zona pellucida layer of the egg. This causes the acrosome to burst, releasing an enzyme that helps the sperm cells to cross the zona pellucida. Now the cortical granules in the secondary oocyte release their content. this causes the zona pellucida to cross-link and harden, thus preventing the fertilisation of the egg by more than one sperm by preventing the entry of the sperm. Therefore, only a single sperm cell penetrates the zona pellucida. So, the correct option is 'Secretions of acrosome help one sperm enter the cytoplasm of ovum through zona pellucida'.

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

Which of the following would be the correct path of a sperm on its way to fertilize an egg?
(i) Urethra
(ii) Epididymis
(iii) Vagina
(iv) Oviduct
(v) Vas deferens

  1. (i), (ii), (iii), (v), (iv)

  2. (i), (iii), (iv), (v), (ii)

  3. (ii), (i), (iii), (iv), (v)

  4. (ii), (v), (i), (iii), (iv)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Sperms are produced in seminiferous tubules.
  • From seminiferous tubules, they pass via seminiferous tubules-------> rete testis------> vasa efferentia--------> epididymis--------> vas deferens----------> urethra.
  • After ejaculation in the vagina, they pass through cervix and uterus to finally reach oviduct.
So, the correct option is '(ii), (v), (i), (iii), (iv)'.

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

Fertilization in humans is practically feasible only if

  1. The sperms are transported into cervix within $48$ hours of release of ovum in uterus

  2. The sperms are transported into vagina just after the release of ovum in fallopian tube

  3. The ovum and sperms are transported simultaneously to ampullary-isthmi junction of fallopian tube

  4. The ovum and sperms are transported simulatenously to ampullary-isthmi junction of cervix.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fertilization in humans is practically feasible only if the sperms are transported into the cervix within 48 hours of the release of an ovum in the uterus. This is because the ovum is present in the fallopian tube in this duration and starts degrading after this.

So, the correct answer  is 'The sperms are transported into cervix within 
4848 hours of the release of the ovum in uterus'.

Multiple choice zoology economic importance of plants and animals animal breeding animal husbandry and its importance introduction to animal husbandry

During egg laying period, they need enough ______ which increases the fertility.

  1. Space and light

  2. Dark and space

  3. Space and temperature

  4. Temperature and pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The correct answer is 'space and light'

Egg laying like any other process is dependent on environmental cues to progress like sunlight which needs to be adequate during this period. Also to be able to lay healthy eggs that dont get infected with microbes or break there needs to be enough space for laying them.

Multiple choice biology reproduction in animals fertilization in human being fertilization in humans human fertilization

A zygote is a/ an

  1. Implanted fertilized egg

  2. Fertilized egg

  3. Ovulated egg

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

  • A zygote is formed by the fusion of a male and a female gamete. In this process, the sperm ruptures the cell wall of the ovum and releases the nucleic acid (chromosome). Thereby forming a diploid zygote. This fusion takes place during the process of fertilisation. 
  • Implanted fertilised egg is the mature form of the zygote.
  • Ovulated egg is a unfertilized egg.
  • A blastocyst is also a mature state of a zygote. So, the correct answer is option B.

Multiple choice biology reproduction in animals fertilization in human being fertilization in humans human fertilization

The process of fertilization in human beings is

  1. Fusion of the male and the female gamete

  2. Seperation of male and the female gamete

  3. Both A and B

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

Fertilization in humans is the fusion of female gamete and a male gamete in the ampulla of the oviduct. The result is the production of a zygote or fertilized egg.
Thus, the correct answer is option A.

Multiple choice biology reproduction in animals fertilization in human being fertilization in humans human fertilization

The region of female reproductive tract where fertilization occurs is

  1. Vagina

  2. Uterus

  3. Cervix

  4. Fallopian tube
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The egg released from the mature Graafian follicle enters the fallopian tube through the ostium. The egg waits in the ampulla region of the fallopian tube for the sperm. The process of fertilisation is te fusion of the male and the female gametes which take place in the fallopian tube.

Thus, the correct answer is option D. 

Multiple choice biology reproduction in animals fertilization in human being fertilization in humans human fertilization

Fertilisation means

  1. The shedding of gametes from a reproductive organ

  2. Adhesion of male and female reproduction organs

  3. Fusion of nuclei of male and female gametes

  4. Transfer of male gamete to female gamete
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Fusion of male and female gamete is a key step in reproduction. This is known as fertilization.
  • Fertilization results in zygote which later develops into embryo.
So, the correct option is 'Fusion of nuclei of male and female gametes'.

Multiple choice biology reproduction in animals fertilization in human being fertilization in humans human fertilization

Fertilization means

  1. Fusion of male and female nuclei

  2. Fusion of two female nuclei

  3. Interaction of male and female reproductive organs

  4. Fusion of two male nuclei
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fertilization is the process in which haploid male and haploid female gamete fuse together to form a diploid zygote. This process is also known as syngamy. In this process, the nucleus of the male gamete fuses with the nucleus of the female gamete to promote the fusion of their genetic material. So, the correct option is A.

Multiple choice botany life processes in living organisms- part 2 parthenocarpic fruits parthenogenesis the life cycle of plants

Development of an embryo directly from an egg cell without the participation of a male gamete is termed as 

  1. Apospory

  2. Parthenogenesis

  3. Apogamy

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Parthenogenesis is a form of asexual reproduction in which growth and development of embryos occur without fertilization. Parthenogenesis occurs naturally in many plants. The word parthenogenesis comes from the Greek; parthenos meaning virgin and genesis meaning birth.

Multiple choice biology the age of adolescence menstruation in females changes at puberty what happens if an egg is not fertilized?

If fertilization doesn't occur, the ovum is released out of

  1. Urine

  2. Menstrual cycle

  3. Sweat

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

The mature egg is released from the ovary and pushed down the fallopian tube for it to fertilize. If no fertilization takes place, the egg degenerates and is shed from the body along with the uterine lining as well as the blood, which happens during the menstruation.
Thus, the correct answer is option B.