BIOLOGY 1A03 Lecture Notes - Lecture 8: Genetic Recombination, Mendelian Inheritance, Chromosome

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Daniel Yang

Document Summary

Traits observed in a mother and father blend together to form the traits observed in their offspring. Offspring"s traits are intermediate or mix between mother and father"s traits. White sheep + black sheep = grey sheep: the inheritence of acquired characters. Traits present in parents are modi ed through use and passed on to their offspring in the modi ed form. Adult giraffes acquire longer necks by straining and produce longer-necked offspring. Most fertilization takes place when pollen grains from the male reproductive organ fall on female reproductive organ on same ower: cross pollination. Mendel arranged matings by removing male organs from one ower and then brushing female organ with pollen collected from another ower. Mendel used garden peas as a genetic model to study the inheritance of traits. First crossed pure lines that differed in just one trait (such as pea shape) Secondly, mendel allowed toe f1 seeds to self-pollinate when they matured.