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प्रश्न
उत्तर
Chromosomes are the thread like structures or chromatin material present inside the nucleus.
Chromosomes are so called because they take up certain basic dye and stain very rapidly. The word chromosome comes from two words "chromos" meaning colour and "soma" meaning body.
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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.
Choose the correct answer:
Chromosome is most coiled at (in mitosis) ________________
Write a sentence of the following:
Centromere
Write a sentence of the following:
Telomere
Give Reasons for the following
The meiosis is called reductional division
Differentiate between
Chromatin and Chromosome.
Give Technical Terms
The stage when sister chromosomes separate from their paired condition.
Give Technical Terms
The stage at which the formation of chiasmata occurs.
Complete the following sentence with appropriate word :
The pairing of homologous chromosomes is called _______.
Multiple Choice Question:
The disappearance of spindle and uncoiling of chromosomes takes place in
Duplicated chromosomes are joined at a point termed ______.
Write the functional activity of the following structure:
Chromosome
Multiple Choice Question
Chromosomal aberrations are caused by:
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. |
Some of the chromosomes have an elongated knob-like appendages known as telomere.
Identify the TRUE statements with respect to aneuploidy.
- When the chromosome number is not the exact multiple of the haploid set, it is described as aneuploidy.
- Aneuploidy is only addition of one or more chromosome(s) to the total number of chromosomes in a cell.
- Aneuploidy is further classified as hypoploidy and hyperploidy.
Given below is a set of four term. Choose the odd one and write the category of the remaining term:
In the human male, a sperm contains autosomes and ______.
Rewrite the correct form of the statement by changing the first or last word only:
Duplicated chromosomes remain attached at a point termed as centrosome.
