BIOA01H3 Lecture Notes - Lecture 16: Pea, Walter Sutton, Dihybrid Cross

• School: Ryerson University
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Mark Fitzpatrick

Document Summary

Until about 1900, scientists and general public believed in blending theory of inheritance, which suggested. Variation in character i. e. purple or white flowers called traits. Established that characters passed to offspring in form of discrete hereditary factors now known as genes. Chose garden pea b/c plant could be grown easily. Female gametes are egg cells, produced in carpel of flowers. Week of october 7th: peas, probability, and pedigree. 10. 1 the beginnings of genetics: mendel"s garden peas that hereditary traits blend evenly in offspring through mixing of parent"s blood. Mendel studied variety of heritable characteristics called characters, i. e. flower colour or seed shape. 10. 1a mendel chose true-breeding garden peas for his experiment. Male gametes are sperm nuclei contained in the pollen, produced by anthers of flower. Normally, pea plants self-fertilize (or self-pollinate): sperm nuclei in pollen fertilize egg cells housed in carpel of same flower. Mendel prevented self-fertilization by cutting off anthers & cross-pollinated with other plants.