Are sister chromatids single stranded DNA?
Each chromatid contains one double-stranded DNA molecule. Sister/Sibling Chromatids: The DNA molecules in sister chromatids are identical because they are the two products of a single semi-conservative DNA replication. … Before S, each chromosome has one chromatid (containing one double-stranded DNA molecule).
Are sister chromatids one molecule?
The sister chromatids are not part of a single DNA molecule because they are not covalently joined together, but rather are tightly associated with each other at the centromeric region.
What is the difference between sister chromatids and non-sister chromatids?
To summarize: Sister chromatids are the duplicated chromosome itself, they contain the exact same alleles. Non-sister chromatids are the chromatids of the homologous chromosome, they may contain different alleles.
Is a chromosome single or double stranded?
Within cells, chromatin usually folds into characteristic formations called chromosomes. Each chromosome contains a single double-stranded piece of DNA along with the aforementioned packaging proteins.
Are sister chromatids separate in mitosis?
Sister chromatids are held together during chromosome replication and remain together until the chromatids are separated at mitosis.