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प्रश्न
What are chromosomes?
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उत्तर
Chromosomes are highly condensed coiled chromatic fibres made of DNA which carries the hereditary material of the organisms.
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.
Mention whether the following statement is (T) Or (F). Give reason in support of your answer.
The unfertilized human egg has half the number of chromosomes of the body cells.
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Minimum coiling in chromosome is at ______________
Choose the correct answer:
Chromosomes number is halved in ____________
Choose the correct answer:
Telocentric chromosomes are _________________
Differentiate between
Chromatin and Chromosome.
Give Technical Terms
The stage at which chromosomes occurs reach the opposite poles.
Complete the following sentence with appropriate word :
The spindle fibers are made of _______.
Complete the following sentence with appropriate word :
Polytene chromosomes are found in _________ of fly larvae.
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.
Name the following:
Pairs of chromosomes, present in human egg cells.
Name the following:
The number of chromosomes present in human gametes.
Name the following:
The diploid number for cell of man.
Name the following:
The pattern of arrangement of genes along a chromosome.
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
The loss of one or more chromosomes in ploidy 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 |
In higher unisexual animals, one pair of chromosomes is not identical in two sexes. It is called as ______.
