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Question
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
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Solution
| X-chromosome | Y-chromosome | |
| 1. | Its non-homologous region is longer as compared to the Y-chromosome. | Its non-homologous region is shorter as compared to the X-chromosome. |
| 2. | It is metacentric. | It is acrocentric. |
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RELATED QUESTIONS
Synthesis phase in the cell cycle is called so, because of the synthesis of more ______.
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) ________________
Label the lettered parts of the given figure and answer the following questions:
(i) What does this diagram represent?
(ii) What is the importance of'd'?
(iii) What are the 'staining' properties of 'b' and 'c'?
(iv) Who gave the term used for this structure today?
(v) What is a?
(vi) Is 'e' present in all chromosomes?
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Multiple Choice Question:
After mitotic cell division, a female human cell will have
State the Location: Chromosomes
Name the following:
The number of chromosomes present in human gametes.
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
