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प्रश्न
Define the following term:
Chromosome
उत्तर
The nucleus contains most of the cell's DNA, which is organised into discrete units called chromosomes.
संबंधित प्रश्न
What are genes?
Choose the correct answer:
If after karyokinesis, cytokinesis does not occur, then result would be _____________
Mention the contribution of the scientist given below in the study of chromosome:
Sutton and Boveri
Choose the correct answer:
Chromosomes are thin and thread like at __________
Choose the correct answer:
Telocentric chromosomes are _________________
Why gametes have a haploid number of chromosomes?
(i) Draw a neat labeled diagram to show the metaphase stage of mitosis in an animal cell having ‘6’ chromosome.
(ii) How many daughter cells are formed at the end of mitosis and at the end of meiosis?
(iii) With reference to cell division explain the following terms:
(Chromatid, Centromere, Haploid).
(iv) Name the type of cell division that occurs during:
1. Growth of shoot 2. Formation of pollen grains.
3. Repair of worn out tissues.
Explain the Term Spindle
Multiple Choice Question:
The disappearance of spindle and uncoiling of chromosomes takes place in
Duplicated chromosomes are joined at a point termed ______.
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
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. |
An inheritable change in the amount or the structure of a gene or a chromosome is called ______.
What' does 'P' and 'Q' represent in the following diagram of X and Y chromosomes? Select the correct option representing, its appropriate description.
Small swellings on the surface of the chromosome are called______.
The chromosomes are duplicated in ______.
