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प्रश्न
Give Technical Terms
The stage when sister chromosomes separate from their paired condition.
उत्तर
Anaphase
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संबंधित प्रश्न
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong
Centrosome.Cell wall, Cell membrane, Large vacuoles
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 |
The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in ______.
Give Reasons for the following
The meiosis is called reductional division
Name the following:
The part of the cell associated with heredity.
Give Technical Terms
The stage at which synapsis in chromosomes to form bivalents.
Give Technical Terms
The stage at which the formation of chiasmata occurs.
Complete the following sentence with appropriate word :
The spindle fibers are made of _______.
State the Location: Polytene chromosome
Give Technical Term:
Transmission of characters through generations.
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
Define euploidy.
The region of the chromosome where the spindle fibres get attached during cell division ______
Some of the chromosomes have an elongated knob-like appendages known as telomere.
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 |
Explain the structure of a chromosome.
Which of the following type of chromosomes has only one telomere?
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
The two non-sister chromatids of a paired chromosome are attached to each other at ______ during the process of crossing over.
Distinguish between the following pair:
Karyotype and Karyokinesis
