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  4. What does A, B and C represent in the given figure of a chromosome ? <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/biology/f41234efcf6097bb1f68e4db83e4f2d7-.png /> A B C (a) Centriole Satellite Primary constriction (b) Centriole Satellite Secondary constriction (c) Centromere Satellite Secondary constriction (d) Centromere Satellite Primary constriction

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Q. What does A, B and C represent in the given figure of a chromosome ?
image
A B C
(a) Centriole Satellite Primary constriction
(b) Centriole Satellite Secondary constriction
(c) Centromere Satellite Secondary constriction
(d) Centromere Satellite Primary constriction

Cell : The Unit of Life

Solution:

Centromere is a non-stainable area, also called as primary constriction. Secondary constrictions are narrower than the primary constriction. These are necessary for the formation of nucleolus (which is formed in the post mitotic reconstruction phase). The area of a chromosome distal to the nucleolar organiser is called satellite or trabant. The presence or formation of satellite is called satellitism. Satellite may be small and knob like. A chromosome having satellite is called as sat chromosome