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प्रश्न
Choose the correct answer:
Chromosomes appear at equator in ____________
पर्याय
anaphase
metaphase
prophase
telophase
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उत्तर
Chromosomes appear at equator in Metaphase
संबंधित प्रश्न
Choose the odd one out and name the category to which it belongs.
Centrosome, Cell wall, Cell membrane, Large Vacuole.
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 |
“First meiotic division is the reduction division” what does the word ‘reduction’ refer to in this statement?
Choose the correct answer:
Thick short chromosomes can be observed at (in mitosis) ___________
What are chromosomes?
(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.
Explain the Term Centrioles
Complete the following sentence with appropriate word :
The spindle fibers are made of _______.
Complete the following sentence with appropriate word :
The pairing of homologous chromosomes is called _______.
Multiple Choice Question:
The period between two successive mitotic divisions is
Name the following:
A specific part of a chromosome that determine hereditary characteristics.
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
Nullisomy is represented by ______.
Define euploidy.
Match the following.
| 1. Autosomes | - | Trisomy 21 |
| 2. Diploid condition | - | 9 : 3 : 3 : 1 |
| 3. Allosome | - | 22 pair of chromosome |
| 4. Down’s syndrome | - | 2n |
| 5. Dihybrid ratio | - | 23rd pair of chromosome |
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.
Which of the following is TRUE with respect to the genes which inherit together during crossing over?
Aneuploidy refers to ______.
