Advertisements
Advertisements
प्रश्न
Give Reasons
Gametes have a haploid (n) number of chromosomes.
उत्तर
The gametes take part in fertilization and after fertilization from the zygote in which the number of chromosomes is doubled. Hence, to maintain a constant number of chromosomes in a species, the gametes have a haploid number of chromosomes.
APPEARS IN
संबंधित प्रश्न
Name the following:
The accessory gland in human males whose secretion activates the sperms
The diagram given below is that of a developing human foetus in the womb. Study the same and answer the question that follow:
What term is given to the period of development of the foetus in the womb?
The figure given below represents the female reproductive system of a mammal.
What will happen if the part B on both sides gets blocked?
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
Give Technical Term:
In how many weeks fetus development is completed?
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Sperm is a highly motile male gamete.
How can plants and animals save themselves from extinction?
The enzyme involved in penetration of sperm into ovum is ______.
Which of the following is the first cell of human life?
Fertilization takes place in ______.
