The Upright Ape: A New Origin of the Species

by Aaron G. Filler, MD, PhD

Figure 4-1 Chromosomal Speciation

Figure 4-1 – Mechanics of Chromosomal Speciation

A new daughter species (B) can originate suddenly when a new chromosome arrangement develops in the parent species (A). A fracture of a large chromosome occurrs in the germ cell line in individual A5. Next we see two fissions in descendant A8. When a new type of  chromosome develops from a fusion of the fragments in B1, the stage is set for a speciation event. These chromosomes are depicted as they appear in the gamete forming cells in the metaphase I stage of meiosis (see figure 4-2).

Figure credit -

© Copyright Aaron G. Filler (2007) The Upright Ape: A New Origin of the Species. Franklin Lakes, New Jersey; New Page Books.

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