BIOL207 Lecture Notes - Lecture 7: Zygote, Eric F. Wieschaus, Morphogenesis
27 Sep 2013
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Lecture 7: consequences of mutation | lecture 8: usefulness of gene. Somatic mutations mutant tissue continues to divide until there is a sector of mutation that doesn"t affect the reproductive organs. Germline mutations mutation that occurs in a gamete or precursor cell; individual itself is not affected by this mutation. Precursor cell blast cell (partially differentiated cell) Mutations stay with the individual as long as it doesn"t compromise viability. Mutations stay within a germ line as long as it doesn"t affect fertility. A flower mutation causes it to turn pink from white. Happened before origin of humans: humans" lack of hair caused by a mutation of a hair gene that resulted in the creation of a gene (a gene that is there but doesn"t do anything = pseudogene) Single base pair mutation cga tga. That"s why humans have less hair than other primates! Happened many generations ago: sickle cell mutation.
