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प्रश्न
Write the functional activity of the following structure:
Spindle fibers
उत्तर
Support chromosomes at the time of cell division.
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संबंधित प्रश्न
What is the difference between chromatin fibre and chromosome?
What are genes?
“First meiotic division is the reduction division” what does the word ‘reduction’ refer to in this statement?
The component which is in the nuclei of cells and carries the hereditary characteristics is called ______.
Choose the correct answer:
Chromosomes appear at equator in ____________
Choose the correct answer:
Minimum coiling in chromosome is at ________________
Choose the correct answer:
A 'V' shaped chromosomes has to _____________
State how does meiosis maintains chromosome number in a species.
(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 stage at which chromosomes occurs reach the opposite poles.
Complete the following sentence with appropriate word :
Chromosomes are _________ material.
Multiple Choice Question:
The period between two successive mitotic divisions is
Name the following:
Pairs of chromosomes, present in human egg cells.
Long answer type question.
Describe the different types of chromosomes.
The loss of one or more chromosomes in ploidy is called ______.
The thin thread-like structures found in the nucleus of each cell are called ______.
Normally, genes occur in a pair of chromosome, but genes of X and Y chromosomes shows different gene loci indicating ______.
The chromosomes are duplicated in ______.
The female gamete/egg cell of a human cell will have ______.
