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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
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संबंधित प्रश्न
Name the sex chromosomes in human males and females
Expand the following biological abbreviations :
DNA
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Minimum coiling in chromosome is at ______________
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
What are chromosomes?
Identify the stages of meiosven below and label them.
Complete the following sentence with appropriate word :
Chromosomes are _________ material.
Write the functional activity of the following structure:
Chromosomes
What is allosome?
Long answer type question.
Describe the different types of chromosomes.
The region of the chromosome where the spindle fibres get attached during cell division ______
Normally, genes occur in a pair of chromosome, but genes of X and Y chromosomes shows different gene loci indicating ______.
Distinguish between the following pair:
Karyotype and Karyokinesis
Aneuploidy refers to ______.
