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What are the different types of chromosomes based on position of centromer?
Josnajohnv
The different types of chromosomes based on the position of centromere are
(i) Metacentric : In this type of chromosome the centromere is present at the centre. All four arms of chromatids are equal in length.
(2) Submetacentric : In this type of chromosome the centromere is situated slightly away from centre. So on one side two arms are long while another side two arms are short.
(3) Acrocentric : In this type of chromosome the centromere is located near the end and hence two arms are very long while two arms are very short. Some times on the distal end of short arms the small filamentous structure is present which possesses a round structure on its lip. This part is known as satellite. The short filament which connects satellite with short arm is known as nucleolar organiser region.
(4) Telocentric : In this type of chromosome the centromere is situated at the tip of chromosome and hence two arms are located only on one side.
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