Chromosomes and Diseases Genetics MBG-210 How many chromosomes in humans? Theophilus Painter in 1921 characterized the number of chromosomes as 24 on spermatocytes. Others repeated the experiment and somehow came up with the same conclusion.
Telomere: a sequence of DNA at the end of the chromosome whose function is to protect the ends of the chromosomal DNA strands during replication.
Centromere: seen on a condensed chromosome as a pinched region, contains proteins which form kinetochores to attach the sister chromatids.