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प्रश्न
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Chromosomes other than sex-chromosomes are autonomous.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
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 |
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:
During mitosis which of the following disintegrate ___________
Choose the correct answer:
The term 'chromosome' was coined by ___________
Explain the Term Chromosomes
Name the following:
Microtubules form the bipolar spindle in which stage.
Complete the following sentence with appropriate word :
The spindle fibers are made of _______.
Duplicated chromosomes are joined at a point termed ______.
Write the functional activity of the following structure:
Chromosome
Name the following:
Pairs of chromosomes, present in human egg cells.
Name the following:
The diploid number for cell of man.
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. |
What is allosome?
Give the example of X- monosomy you have studied.
The centromere is found at the centre of the ______ chromosome.
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 |
In higher unisexual animals, one pair of chromosomes is not identical in two sexes. It is called as ______.
