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प्रश्न
Answer the following question in your own words.
What is meant by ‘chromosome’?
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उत्तर
The structure in the nucleus of cells that carries the hereditary characteristics is called the chromosome. It is made up mainly of nucleic acids and proteins. During cell division chromosomes can be clearly seen under the compound microscope. ‘Genes’ which contain the information about hereditary characteristics in coded form are located on chromosomes. Each species has a specific number of chromosomes.
Each chromosome is made up of DNA and it appears dumbell-shaped midway during cell division. There is a constricted region on each chromosome. It is called the ‘Primary constriction’ or ‘Centromere’. This divides the chromosome into two parts. Each part is called an ‘arm’. The centromere has a specific position in each chromosome.
Organization of chromosome
APPEARS IN
संबंधित प्रश्न
State the exact location of the Centromere
Name the sex chromosomes in human males and females
What is the difference between chromatin fibre and chromosome?
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Centromere is related to _______________
Mention the contribution of the scientist given below in the study of chromosome:
Sutton and Boveri
Write a sentence of the following:
Telomere
Explain the Term Centrioles
Explain the Term Spindle
Name the following:
The part of the cell associated with heredity.
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.
Multiple Choice Question:
The period between two successive mitotic divisions is
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
What is allosome?
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.
Distinguish between the following pair:
Karyotype and Karyokinesis
