"All but one of this lungfish's 19 chromosomes is the size of the entire human genome, so it takes a lot of energy to copy that DNA. And the nucleus and cell that encase it must be bigger." ...

However, defining the human diploid chromosome number would prove more challenging than investigators initially anticipated. Theophilus Painter was one of the preeminent cytologists of the early ...

In all cultures examined the chromosome number was predominantly 46, as shown in Table 1, and in every case there was a normal female karyotype. A representative tissue section, metaphase and ...