Final answer:
Sympatric speciation can be initiated by chromosomal errors or the adaptation to a new resource, resulting in genetic differences and eventually leading to speciation.
Step-by-step explanation:
Sympatric speciation, the creation of a new species without geographic separation, can be initiated by different factors. One way sympatric speciation can occur is through chromosomal errors during cell division, resulting in gametes with extra chromosomes. Another way is through the adaptation and exploitation of a new resource, causing individuals to interact more with each other and breed within their own group. These interactions and genetic differences can eventually lead to speciation.