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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 |
उत्तर
| Column ‘A’ | Column ‘B’ | ||
| 1. | Chromosomes get arranged in a horizontal plane at the equator. |
d. | Metaphase |
| 2. | Daughter chromosomes move to the opposite poles of a spindle |
a. | Anaphase |
| 3. | Chromosomes become visible as fine, long threads. |
b. | Prophase |
| 4. | Chromosomes lose their distinctiveness and gradually become transformed into a chromatin network. |
c. | Telophase |
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संबंधित प्रश्न
Name the following:
The number of chromosomes present in a nerve cell of a human being.
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.
Fill in the blank
The _______ (s) are surrounded by radiating rays called aster
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?
Give Reasons for the following
Chromosomes are the carriers of heredity.
Explain the Term Chromosomes
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.
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column I | Column II |
| Genetics | Chromosomes are similar in size and shape. |
| Autosomes | The alternative forms of a gene. |
| Recessive gene | Study of laws of inheritance of characters |
| Allele | A gene that can express only when in a similar pair. |
| Homologous chromosomes | Chromosomes are other than the pair of sex chromosomes. |
Long answer type question.
Describe the different types of chromosomes.
Nullisomy is represented by ______.
Define euploidy.
The thin thread-like structures found in the nucleus of each cell are called ______.
Some of the chromosomes have an elongated knob-like appendages known as telomere.
Read the following statements and select the correct option.
Statement I: The densely packed transcriptionally active, light staining region of chromatin is known as 'Heterochromatin'.
Statement II: The loosely packed, dark staining transcriptionally inactive region of chromatin is known as 'Euchromatin'.
Which of the following is TRUE with respect to the genes which inherit together during crossing over?
In the human male, a sperm contains autosomes and ______.
