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प्रश्न
Long answer type question.
Describe the different types of chromosomes.
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उत्तर
Following are the four types of chromosomes with respect to the position of the centromere: Acrocentric (j shaped), Telocentric (i shaped), Sub-metacentric (L shaped) and Metacentric (V-shaped).
| Type of chromosome | Name of chromosome | Position of centromere |
 |
Metacentric | Middle of the chromosome |
 |
Sub-metacentric | Some distance away from the centre of chromosomes |
 |
Acrocentric | Near one end of the chromosome |
 |
Telocentric | At one end |
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संबंधित प्रश्न
Give appropriate biological or technical terms for the following :
The condition in which a pair of chromosomes carries similar alleles of a particular character.
Expand the following biological abbreviations :
DNA
Choose the correct answer:
Centromere is related to _______________
Choose the correct answer:
Chromosome number of man is _____________
What are chromosomes?
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.
Give the example of X- monosomy you have studied.
Read the following statements and select the correct option.
Statement I: The densely packed transcriptionally active, light staining region of chromatin is known as 'Heterochromatin'.
Statement II: The loosely packed, dark staining transcriptionally inactive region of chromatin is known as 'Euchromatin'.
A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?
