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प्रश्न
Give the significance of fertilization.
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उत्तर
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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संबंधित प्रश्न
Define the Zygote.
Suppose a normal woman has never borne a child; How many mature eggs would she have produced in her lifetime? Your calculation should be based on two clues-
(a) Eggs are produced at the rate of 1 egg every 28 days (one menstrual cycle)
(b) A woman’s total reproductive period is 13 – 45 years.
One egg is released from each of the two ovaries every month.
Complete the following statement by choosing the correct alternative:
Fertilization occurs in ______.
Define the following:
Ovulation
The diagram given below is that of a developing human foetus in the womb. Study the same and answer the question that follow:
Mention two functions of the parts labelled '2' other than its endocrine functions.
Name the female sex hormones and structures which secrete them.
Differentiate
External fertilization and Internal fertilization.
Multiple choice question.
In human female, the fertilized egg gets implanted in uterus _______.
Explain the mechanism of fertilization in humans.
Identify the function of fertilization membrane.
In markets, eggs of birds are available but never eggs of dogs. why?
The eggs of frogs do not have shells for protection, yet they are safe in water, how?
State whether the following statement is True or False. If false, correct the statement:
Human egg has a head, middle piece and tail.
In which part of the human female reproductive system do the following events take place?
Fertilization
During copulation, approximately how much semen containing how many spermatozoa is deposited in the vagina?
What structure forms on the egg membrane at the site of sperm contact during fertilization?
What is the diameter of the human ovum?
