Advertisements
Advertisements
प्रश्न
Briefly discuss the importance of chromosomes to an organism
उत्तर
The most important feature of a living cell is that it can divide or reproduce of its own kind and this function is regulated by the nucleus of the cell. The nucleus in its nucleoplasm contain a network of dark stained thread like structures called chromatin fibres. These fibres during cell division become thick and ribbon like which are then called chromosomes. The chromosomes are the actual hereditary factors. These are unique for each species both in number and in character.
The human body has 46 chromosomes which occur in pairs. They are further categorised as:
- Chromosomes specific for determining the sex of the species called the sex chromosomes.
- Other chromosomes are called autosomes.
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true (T) or False (F):
Centrosome occurs in animal cells.
Fill in the blanks :
More than a thousand chromosomes are found in the nucleus of certain _______.
Distinguish between the following pairs of science :
Cell wall and cell membrane
State the major function of the following :
Vacuoles
Fill in the blanks:
Muscles cells are ______ and contractile.
Write true or false for each statement. Rewrite the false statements correctly:
A mitochondrion is bound by two membranes
Give one main function of the following:
Chromosomes
Identify the cellular structure with the help of the following clue:
It consists of cisternae, vesicles and vacuoles.
Identify the cellular structure with the help of the following clue:
It destroys foreign substances.
Identify the cellular structure with the help of the following clue:
It gives turgidity to the plant cells.
