MindMap Gallery The genetic basis of species formation
The genetic basis of species formation involves multiple mechanisms. Gene mutation and recombination provide genetic diversity to species and serve as the foundation for natural selection. Natural selection drives species adaptation to environmental changes by retaining favorable variations and eliminating unfavorable ones. Reproductive isolation is a critical step in species formation, encompassing various forms such as geographical isolation, behavioral isolation, mechanical isolation, and gametic incompatibility. Gene flow and genetic drift also affect the genetic composition of species, especially in small populations. Additionally, polyploidy formation, through chromosome doubling and germline fusion, offers new pathways for species evolution.
Edited at 2025-01-11 14:06:00