Why did it take until 1956 to figure out the correct human chromosome number, thanks to Joe Hin Tjio and Albert Levan? Aa Aa Aa The rediscovery of Mendel's laws near the beginning of the twentieth ...

Each arm of the chromosome is then divided into regions, and the numbers assigned to each region get larger as the distance from the centromere to the telomere increases. Regions are identified by ...