Advertisements
Advertisements
प्रश्न
Give scientific reason.
The new individual produced by sexual reproduction always has the recombined genes of both the parents.
Advertisements
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
State whether the following statement is true (T) or false (F):
The plumule of an embryo gives rise to the root system.
When pregnancy does not occur, the life of corpus luteum is about ______.
One egg is released from each of the two ovaries every month.
Rewrite the correct statement by changing the last one word if these statement is false.
Pregnancy in women can be prevented by the method of vasectomy.
Give the functions of the following:
Fallopian tube
Define the following:
Spermatogenesis
Give Reasons
Millions of sperms are produced at ejaculation yet one sperm actually fertilizes the ovum. Explain.
Give Reasons
The oviduct funnel is lined with cilia.
Differentiate
Isogametes and Heterogametes.
Give Technical Term:
How much semen is discharged per ejaculation in a man?
Complete the following sentences with appropriate word:
Fertilization of the human egg by the sperm normally occurs in the_______
Fertilization of the ovum generally takes place in the ______.
In human beings, after fertilisation, the structure which gets embedded in the wall of uterus is
Give any four significances of fertilization in humans.
Match the pair:
| 'A' | 'B' | ||
| (1) | Male | (a) | 44 + XX |
| (b) | 44 + XY | ||
| (c) | 44 + YY |
On which day of the menstrual cycle does ovulation typically occur?
What is the meiotic stage of the ovum at the time of ovulation?
How long after ovulation can the ovum be fertilized?
Which substance is located on the surface layer of the egg and acts to attract compatible sperm?
What are the two sequential blocks that prevent polyspermy?
