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प्रश्न
Multiple Choice Question:
The disappearance of spindle and uncoiling of chromosomes takes place in
पर्याय
Anaphase
Telophase
Pachytene
Meiosis
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उत्तर
Telophase
APPEARS IN
संबंधित प्रश्न
Correct the following statement if there is any mistake:
If there are 46 chromosomes in a cell, there will be 23 chromatin fibres inside the nucleus during interphase.
What are genes?
Given below is a schematic diagram of a portion of DNA.
- How many strands are shown in the diagram?
- How many nucleotides have been shown in each strand?
- Name the parts numbered 1, 2, 3, 4 and 5 respectively.
- Name the DNA unit constituted by the parts 1, 2, 3 collectively.
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
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:
Chromosome is most coiled at (in mitosis) ________________
State how does meiosis maintains chromosome number in a species.
What is the importance of meiosis?
Differentiate between
Cytokinesis in plant and animal cell
Draw a duplicate chromosome and label its part.
Explain the Term Zygotene
Complete the following sentence with appropriate word :
The spindle fibers are made of _______.
Multiple Choice Question:
The period between two successive mitotic divisions is
Write the functional activity of the following structure:
Spindle fibers
Name the following:
Cells having a single set of chromosomes.
Give Technical Term:
Transmission of characters through generations.
Some of the chromosomes have an elongated knob-like appendages known as telomere.
Explain the structure of a chromosome.
Generally, the recessive character is expressed only when present in a double recessive condition i.e. homozygous condition. However, a single recessive gene can express itself in human beings when the gene is present on ______
Small swellings on the surface of the chromosome are called______.
