BIG CONFUSION - Biology Forum

last updated by

protozoan 18 years, 2 months ago

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- September 28, 2006 at 3:37 am #5833
  asutoshsahu
  Participant
  Hello Guys,
  I was reading the structure of Chromosome where i confused with two terms.
  These terms are Chromonema and Chromatid.
  I know Each chromosome has two chromatids attached at the centromere.
  But where is the Chromonemata and where is DNA. I am quoting a sentence from my book
  quote :
  Chromonema is a DNA Histone thread or chromatin strand which is coiled, folded and packed to form the bulk of chromosome. There is one chromonema (ds DNA) per chromosome…… …. …. … Two Chromonemata (2 DNA) occur where a chromosome has two chromatids.
  A chromosome has a ds DNA then how many chromatids and chromonema in a chromosome.
  Which one contains the DNA — Chromatid or chromonemata and how the two DNA strands are there in these structures.
  I am very confused with this. Please Help me. 🙄
- October 5, 2006 at 2:27 pm #56026
  Pecatum
  Participant
  The coiled filament that extends the entire length of a chromosome and on which the genes are located.
  http://medical-dictionary.thefreedictio … chromonema
- October 6, 2006 at 12:13 pm #56078
  protozoan
  Participant
  HI
  During mitosis, there are two chromatids per chromosome =two chromonemata (according to your book) = two ds DNA(identical), when they separate, one chromatid = one chromosome =one chromonema= one dsDNA.
  This should be answer to your first question.
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