chromosome structure
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9 Terms
dna double helix
basic structural unit of the chromosome comprised of nucleotides
histones
proteins around which dna wraps to form nucleosomes, condensing dna for regulation of gene expression
nucleosomes
dna segment wrapped around histones, fundamental unit of chromatin
chromatin
dna/protein complex forming chromosomes
euchromatin
loosely packed chromatin more accessible for gene expression
heterochromatin
tightly packed chromatin that is less accessible and often inactive
centromere
part of the chromosome where sister chromatids are joined and where spindle fibers attach during cell division
telomeres
repetitive dna sequences at the end of chromosomes that protect the chromosome from degradation and fusion
sister chromatids
identical chromosome copies joined at the centromere after dna replication but separated in mitosis
Note 
Flashcards (45)