At the end of this activity, students should be able to present the levels of DNA organization from double helix to metaphase chromosome, explain the role of histones in the spatial structure of DNA, present the morphology of metaphase chromosome, define homologous chromosomes, autosomes and heterosomes, describe a karyotype and the principles of its preparation and explain the terms locus, allele, homozygote and heterozygote.

Originally released by Learnetic, 2016.