PSYCH 3GG3 Lecture Notes - Lecture 5: Methylation, X-Inactivation, Genomic Imprinting

• School: McMaster University
• Department: Psychology
• Course: PSYCH 3GG3
• Professor: Mel Rutherford

Document Summary

Set sail in 1831 - collected many specimens: published on the origin of species in 1859. Sold out immediately - widely read and got a lot of attention, internationally known. The modern synthesis: the modern understanding that mendel"s particulate mechanism of inheritance was the heritable matter than darwin"s theory of natural selection relied upon. Darwin"s problem: blended inheritance: understood that offspring inherited something from their parents. But the understanding at the time was that offspring got a blending of the parents: but in this model, new mutations cannot take hold. If there is one tall tree that gets more light and has better fitness, blended selection averages this across the generations and the mutation will never take hold. Look at pea plant with distinct, heritable traits: yellow or green, wrinkled or smooth, tall or short. Started with two plants that were bred true, tall only from tall and short only from short.