what is the difference between chromosome, chromatin fibre and chromatid sisters?
Answers
Answer:
Chromatin
is composed of DNA and histones that are packaged into thin, stringy fibers. The chromatin undergoes further condensation to form the chromosome. So the chromatin is a lower order of DNA organization, while chromosomes are the higher order of DNA organization.
Chromosome
are single-stranded groupings of condensed chromatin. During the cell division processes of mitosis and meiosis, chromosomes replicate to ensure that each new daughter cell receives the correct number of chromosomes. A duplicated chromosome is double-stranded and has the familiar X shape. The two strands are identical and connected at a central region called the centromere.
Chromatid
A chromatid is either of the two strands of a replicated chromosome. Chromatids connected by a centromere are called sister chromatids. At the end of cell division, sister chromatids separate and become daughter chromosomes in the newly formed daughter cells.