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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
Mention the function of Seeds.
Rewrite the terms in the correct order so as to be in a logical sequence.
coitus, ovum, Sperm, sperm duct, urethra, Vagina.
What happens to uterus if fertilization takes place? And what happens to uterus if fertilization does not take place?
Name the following:
Fusion of sperm and ovum.
Name the following:
Virgin birth
Complete the following statement by choosing the correct alternative:
Fertilization occurs in ______.
Define the following:
Ovulation
The following diagram represents the vertical sectional view of the human female reproductive system.
What happens to the uterus, if fertilization fails to take place?
Where does fertilization occur?
Name the female sex hormones and structures which secrete them.
Give Reasons
The urethra is also called urinogenital duct.
Give Reasons
The acrosome of sperm secretes an enzyme called hyaluronidase at the time of fertilization
Give Technical Term:
The place where fertilization occurs in the female reproductive system.
What is fertilization?
Which of the following is the first cell of human life?
In markets, eggs of birds are available but never eggs of dogs. why?
In which part of the human female reproductive system do the following events take place?
Fertilization
Name the three main regions of the human sperm, and briefly mention the function of each.
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. |
