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प्रश्न
Choose the correct answer:
Chromosomes are thin and thread like at __________
पर्याय
interphase
metaphase
anaphase
pachytene
उत्तर
Chromosomes are thin and thread like at interphase
APPEARS IN
संबंधित प्रश्न
What are genes?
Given below is a schematic diagram of a portion of DNA.
- How many strands are shown in the diagram?
- How many nucleotides have been shown in each strand?
- Name the parts numbered 1, 2, 3, 4 and 5 respectively.
- Name the DNA unit constituted by the parts 1, 2, 3 collectively.
Choose the correct answer:
Centromere is related to ________
Choose the correct answer:
Chromosome is most coiled at (in mitosis) ____________
Label the lettered parts of the given figure and answer the following questions:
(i) What does this diagram represent?
(ii) What is the importance of'd'?
(iii) What are the 'staining' properties of 'b' and 'c'?
(iv) Who gave the term used for this structure today?
(v) What is a?
(vi) Is 'e' present in all chromosomes?
Choose the correct answer:
The term 'chromosome' was coined by ___________
How does colchicine act as mitotic poison? Is there any advantage of it?
What is the importance of meiosis in creating variations?
Give a reason for the following:
Gametes must be produced by meiosis for sexual reproduction.
Differentiate between
Cytokinesis in plant and animal cell
(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 Technical Terms
The phase of meiosis at which homologous chromosomes are separated.
Compare X chromosome and Y chromosome.
Nullisomy is represented by ______.
Describe the structure of sex chromosomes with the help of labelled diagram.
The centromere is found at the centre of the ______ chromosome.
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'.
Which of the following is TRUE with respect to the genes which inherit together during crossing over?
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
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.
