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प्रश्न
The sex of the newborn child is a matter of chance and neither of the parents may be considered responsible for it. What would be the possible fusion of gametes to determine the sex of the child?
उत्तर
Sex determination is a chance of probability as to which category of sperm fuses with the egg. If the egg (X) is fused by the X-bearing sperm an XX individual (female) is produced. If the egg (X) is fused by the Y-bearing sperm an XY individual (male) is produced. The sperm, produced by the father, determines the sex of the child. The mother is not responsible for determining the sex of the child.
Now let’s see how the chromosomes take part in this formation. Fertilization of the egg (22+X) with a sperm (22+X) will produce a female child (44+XX). while fertilization of the egg (22+X) with a sperm (22+Y) will give rise to a male child (44+XY).
APPEARS IN
संबंधित प्रश्न
Choose the correct answer:
Centromere is related to ________
Choose the correct answer:
Chromosomes appear at equator in ____________
Choose the correct answer:
Chromosomes largely consist of _______________
Choose the correct answer:
Chromosome number of man is _____________
Differentiate between
Cytokinesis in plant and animal cell
(i) Draw a neat labeled diagram to show the metaphase stage of mitosis in an animal cell having ‘6’ chromosome.
(ii) How many daughter cells are formed at the end of mitosis and at the end of meiosis?
(iii) With reference to cell division explain the following terms:
(Chromatid, Centromere, Haploid).
(iv) Name the type of cell division that occurs during:
1. Growth of shoot 2. Formation of pollen grains.
3. Repair of worn out tissues.
Give Technical Terms
The stage at which the formation of chiasmata occurs.
Multiple Choice Question:
The period between two successive mitotic divisions is
Describe the structure of sex chromosomes with the help of labelled diagram.
The female gamete/egg cell of a human cell will have ______.
