How Females Choose The 'Right' Sperm To Avoid Hybrid Fertilizations
Friday, August 16, 2013 - 10:40
in Biology & Nature
Females select the 'right' sperm to fertilize their eggs when faced with the risk of being fertilized by wrong sperm from a different species and researchers recently set out to investigate salmon and trout, which fertilize externally in river water, because the two species occasionally hybridize in the wild. Since hybrid offspring become reproductive dead-ends, females of both species are under selection to avoid hybrid fertilizations, and instead promote external fertilization by their own species' sperm. read more