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प्रश्न
Choose the correct answer:
During mitosis which of the following disintegrate ___________
विकल्प
nucleolus
nuclear membrane
both (a) and (b)
none of these
उत्तर
During mitosis which of the following disintegrate Both (a) and (b)
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संबंधित प्रश्न
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.
Fill in the blank
The _______ (s) are surrounded by radiating rays called aster
Answer the following question in your own words.
What is meant by ‘chromosome’?
Choose the correct answer:
Centromere is related to ________
Choose the correct answer:
Thick short chromosomes can be observed at (in mitosis) ___________
The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in ______.
Enumerate the various changes that occur in the nucleus of the cell during prophase.
Differentiate between
Cytokinesis in plant and animal cell
Draw a duplicate chromosome and label its part.
Name the following:
The part of the cell associated with heredity.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Chromosomes are the thickest and shortest in telophase.
Duplicated chromosomes are joined at a point termed ______.
Write the functional activity of the following structure:
Spindle fibers
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
Name the following:
A specific part of a chromosome that determine hereditary characteristics.
Give the example of X- monosomy you have studied.
An inheritable change in the amount or the structure of a gene or a chromosome is called ______.
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 |
After a mitotic cell division, a human female cell will have ______.
