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
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.
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.