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Question
Give the significance of fertilization.
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Solution
Significance of fertilization:
- Fertilization maintains the diploid number of chromosomes in the newly formed zygote.
- It combines characters from two parents bringing about variation in the offspring.
- It determines the sex of the offspring.
- Fertilization introduces centrioles in the cell which are missing in the ovum.
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RELATED QUESTIONS
Give the appropriate term for the following:
Process of fusion of ovum and sperm.
Given below is a portion of the diagram to show the diagrammatic highly magnified view of a single human sperm. Complete the diagram to show its normal structure.
Give appropriate term of the following:
The attachment of developing zygote (blastocyst) on the uterine wall.
Name the following:
Organ where fertilization occurs.
Write in sequence the regions in which a mature sperm travels from the seminiferous tubules up to the urethral opening?
Name two essential structures which take part in fertilization.
Give Reasons
Millions of sperms are produced at ejaculation yet one sperm actually fertilizes the ovum. Explain.
Study the diagram given below and then answer the questions that follow:
(i) Name the part labeled A. Name any two hormones produced by the part labeled A.
(ii) What happens to the part labeled B.
(1) if fertilization takes place?
(2) If fertilization does not take place?
(iii) Where does fertilization occur?
(iv) Draw a neat diagram of the human sperm as seen under high magnification and label the following parts.
(1) Acrosome
(2) Mitochondria
Name the Following
The basic unit of the testes.
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The place where fertilization occurs in the female reproductive system.
Complete the following sentences with appropriate word:
___________ hormones are secreted by the interstitial cells.
Complete the following sentences with appropriate word:
One egg is normally released from the ovary in the human females after
__________
Write the functional activity of the following structure:
Seminal vesicles
Explain the mechanism of fertilization in humans.
Which of the following occurs due to the process of capacitation?
State whether the following statement is True or False. If false, correct the statement:
External fertilisation can occur both in water and on land.
What are autosomes chromosomes?
Match the items in column I with those in column II and write down the matching pairs (some may not match).
| Column I | Column II | ||
| (a) | Acrosome | (i) | An embryo which looks like human baby. |
| (b) | Gestation | (ii) | Luteinizing hormone |
| (c) | Menopause | (iii) | Ovum producing cells. |
| (d) | Foetus | (iv) | Semen |
| (e) | Oogenesis | (v) | Spermatozoa |
| (f) | Ovulation | (vi) | Complete stoppage of menstrual cycle. |
| (vii) | Time taken by a fertilised egg till the delivery of baby. |
Write the specific location of the following:
Acrosome
