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प्रश्न
Give scientific reason.
The new individual produced by sexual reproduction always has the recombined genes of both the parents.
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उत्तर
- Sexual reproduction involves two parents i.e. male parent and female parent.
- The male gamete coming from a male parent fuses with a female gamete of a female parent to form a zygote which develops into an embryo and then into a new individual.
Thus, the new individual always has the recombined genes of both the parents.
संबंधित प्रश्न
Differentiate between the following pair:
Efferent duct and sperm duct
Give the functions of the following:
Fallopian tube
Define the following:
Ovulation
Define the following:
Spermatogenesis
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.
Give Reasons
The urethra is also called urinogenital duct.
Complete the following sentences with appropriate word:
___________ hormones are secreted by the interstitial cells.
Complete the following sentences with appropriate word:
Fertilization of the human egg by the sperm normally occurs in the_______
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Vas deferens transports sperms into the urethra.
Multiple choice question.
In human female, the fertilized egg gets implanted in uterus _______.
Explain the mechanism of fertilization in humans.
Which parts are converted into Seed and fruit respectively after fertilization?
How can plants and animals save themselves from extinction?
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.
State whether the following statement is True or False. If false, correct the statement:
The eggs of fish are covered by hard shells for protection.
Explain tubectomy and vasectomy.
Match the pair:
| 'A' | 'B' | ||
| (1) | Male | (a) | 44 + XX |
| (b) | 44 + XY | ||
| (c) | 44 + YY |
What are the potential drawbacks in adoption of the IVF method?
- High fatality risk to mother.
- Expensive instruments and reagents.
- Husband/wife necessary for being donors.
- Less adoption of orphans.
- Not available in India.
- Possibility that the early embryo does not survive.
Choose the correct answer from the options given below:
