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प्रश्न
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
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उत्तर
| X-chromosome | Y-chromosome | |
| 1. | Its non-homologous region is longer as compared to the Y-chromosome. | Its non-homologous region is shorter as compared to the X-chromosome. |
| 2. | It is metacentric. | It is acrocentric. |
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संबंधित प्रश्न
What is the difference between chromatin fibre and chromosome?
Choose the best option out of the four alternatives a, b, c and d
Question 1:
The number of chromosomes in a certain type of cell division is halved. This kind of cell
division occurs in.
(a) Only testis
(b) Only ovary
(c) Both ovary and testis
(d) All body cells
Chromosomes are mainly made up of ______.
Choose the correct answer:
Chromosomes number is halved in _____________
Label the lettered parts of the given figure and answer the following questions:
(i) What does this diagram represent?
(ii) What is the importance of'd'?
(iii) What are the 'staining' properties of 'b' and 'c'?
(iv) Who gave the term used for this structure today?
(v) What is a?
(vi) Is 'e' present in all chromosomes?
Choose the correct answer:
Chromosomes largely consist of _______________
(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.
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?
Define Aneuploidy.
