Natural selection comes in two forms, positive and negative. Positive selection is supposed to improve species, but Dr Rob gives a clear example where bad mutations are amplified. Negative selection is supposed to keep species from degrading, but Dr Rob uses the same example to show how it occurs too late. Based on an article from Creation.com.
Main Citation: Neville, M.D.C. et al., Sperm sequencing reveals extensive positive selection in the male germline, Nature 2025 | DOI:s41586-025-09448-3 Link: pmc.ncbi.nlm.nih.gov/articles/PMC12611758
Edwards, C.J. et al., Ancient hybridization and an Irish origin for the modern polar bear matriline, Curr. Biol.21(15):1251–1258, 2011.
Podden och tillhörande omslagsbild på den här sidan tillhör
Dr. Robert Carter. Innehållet i podden är skapat av Dr. Robert Carter och inte av,
eller tillsammans med, Poddtoppen.
