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प्रश्न
Answer the following question in your own words.
What is meant by ‘chromosome’?
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
What is the difference between chromatin fibre and chromosome?
Mention the contribution of the scientist given below in the study of chromosome:
Strasburger
Mention the contribution of the scientist given below in the study of chromosome:
Sutton and Boveri
State how does meiosis maintains chromosome number in a species.
Identify the stages of meiosven below and label them.
Name the following:
The part of the cell associated with heredity.
Multiple Choice Question:
How many chromosomes are found in a cell of humans?
Multiple Choice Question:
The period between two successive mitotic divisions is
Write the functional activity of the following structure:
Chromosome
Name the following:
A specific part of a chromosome that determine hereditary characteristics.
Name the following:
Pair of genes responsible for a particular characteristic.
The thin thread-like structures found in the nucleus of each cell are called ______.
Generally, the recessive character is expressed only when present in a double recessive condition i.e. homozygous condition. However, a single recessive gene can express itself in human beings when the gene is present on ______
Small swellings on the surface of the chromosome are called______.
A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?
After a mitotic cell division, a human female cell will have ______.
Define the following term:
Chromatid
