After they’ve separated, the two former sister chromatids are called unreplicated chromosomes. … The two chromatids of each sister chromatid pair are segregated into separate cells in both mitosis and meiosis. But they remain together throughout the first division during meiosis (meiosis I).
Do sister chromatids exist in Unreplicated chromosomes quizlet?
a. Each unreplicated chromosome consists of two sister chromatids.
Does an unreplicated chromosome have a sister chromatid attached?
a unreplicated chromosome has one DNA molecule; a replicated chromosome has two identical DNA molecules (sister chromatids) attached at the centromere.
Can a chromosome have one chromatid?
When fully condensed, replicated chromosomes appear as thick X-shaped structures that are readily observed under the microscope (see figure below). Chromosomes can have 1 or 2 chromatids, depending on whether they have replicated.
Is a chromosome a single strand of DNA?
Each chromosome contains a single double-stranded piece of DNA along with the aforementioned packaging proteins. … This condensed form is approximately 10,000 times shorter than the linear DNA strand would be if it was devoid of proteins and pulled taut.
What is the main difference between Chromatin and chromosomes?
Chromatin is a complex formed by histones packaging the DNA double helix. Chromosomes are structures of proteins and nucleic acids found in the living cells and carry genetic material. Chromatin is composed of nucleosomes. Chromosomes are composed of condensed chromatin fibers.
What does N and 2N stand for in genetics?
– Genomic (X) number is a set of different chromosomes 2N = number of chromosomes in somatic cells (somatic chromosome number) N = number of chromosomes in gametic cells (gametic chromosome number) X = Number of chromosomes in a genome complement (genomic chromosome number) 4.