Definition & key points of Nucleus and Chromosomes

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TERMS	DEFINITIONS
Telocentric	The centromere is present at the ends of the chromatids.
Acrocentric	The centromere is present near the end of chromatids. the chromosomes have two very small arm and iwo very long arms.
Sub metacentric	The centromere is present near the middle of the chromatids. Chromosome contains arms of unequal length.
Metaccntric	‘Hie centromere is present at the middle of the chromat ids. Chromosome contains equal arms.
Nucleosome	Four types of Histone protein form a core particle called nucleosomc.
Looped domains	The solenoid fiber forms loops called loop
Heterochromatic region	These are inactive portions of chromosomes. They show a banding pattern with certain stains. So they are called heterochromatin.
Euchromatic region	The active portions of chromosomes are ---------------------------- ---------------------------- called euchromatic regions.
Karyotype	A karyotype is the complete set of all chromosomes of a cell of any living organism.
Karyology	The stud) of karyotypes is known as
Colchicine	Colchicine is a drug which prevents

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