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प्रश्न
Name the sex chromosomes in human males and females
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उत्तर
Sex chromosomes in human males are X and Y.
Sex chromosomes in human females are XX.
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संबंधित प्रश्न
Match the events given in column A with the phase in mitotic cell division in column B.
| Column ‘A’ | Column ‘B’ | ||
| 1. | Chromosomes get arranged in a horizontal plane at the equator. |
a. | Anaphase |
| 2. | Daughter chromosomes move to the opposite poles of a spindle |
b. | Prophase |
| 3. | Chromosomes become visible as fine, long threads. |
c. | Telophase |
| 4. | Chromosomes lose their distinctiveness and gradually become transformed into a chromatin network. |
d. | Metaphase |
Choose the correct answer:
In an interphase cell chromosome are as _____________
Choose the correct answer:
Chromosomes appear at equator in ____________
Choose the correct answer:
During mitosis which of the following disintegrate ___________
The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in ______.
What is the importance of meiosis in creating variations?
(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 phase of meiosis at which homologous chromosomes are separated.
Complete the following sentence with appropriate word :
Chromosomes are _________ material.
Complete the following sentence with appropriate word :
Polytene chromosomes are found in _________ of fly larvae.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Chromosomes other than sex-chromosomes are autonomous.
Duplicated chromosomes are joined at a point termed ______.
Multiple Choice Question:
After mitotic cell division, a female human cell will have
Name the following:
The diploid number for cell of man.
What is allosome?
The number of chromosomes found in human beings is ______.
Identify the TRUE statements with respect to aneuploidy.
- When the chromosome number is not the exact multiple of the haploid set, it is described as aneuploidy.
- Aneuploidy is only addition of one or more chromosome(s) to the total number of chromosomes in a cell.
- Aneuploidy is further classified as hypoploidy and hyperploidy.
Small swellings on the surface of the chromosome are called______.
The female gamete/egg cell of a human cell will have ______.
In the human male, a sperm contains autosomes and ______.
