One of a pair of chromosomes arising by duplication during mitosis or by pairing during meiosis, and joined together at the centromere.
Note: Sister chromatid refers to either one of the joined pair arising from the same chromosome by duplication, and non-sister chromatid refers to either of the joined homologous chromosomes of maternal or paternal origin arising during meiosis.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 736 (https://doi.org/10.1515/pac-2015-1202)