Earth Sciences 1083F/G Lecture 5: Lecture 5 - Mendel to Modern Synthesis

• School: Western University
• Department: Earth Sciences
• Course: Earth Sciences 1083F/G
• Professor: Cameron Tsujita

Document Summary

bred garden peas and analyzed the offspring of the matings. wrinkled seeds x round seeds = 100% round seed in next generation. round x round = 75% round, 25% wrinkled. 1/3 of third generation: round x round = 100% round. 2/3 of third generation: round x round = 75% round, 25% wrinkled. genotype: 16 rr, (25%) 32 rr (50%), 16 rr (25%) phenotype: 48 round (75%), 16 wrinkled (25%) r r r r. Rr rr rr rr rr rr rr rr: explanation: 1. in the organism there is a pair of factors that controls the appearance of a given characteristic. (now called genes) 2. the organism inherits these factors from its parents, one from each. 3. each is transmitted from generation to generation as a discrete, unchanging unit. 4. when the gametes are formed, the factors separate and are distributed as units to each gamete (sex cell).