01:119:115 Lecture Notes - Lecture 7: Gregor Mendel, Gamete, Gynoecium

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:115
• Professor: Daniel Stern Cardinale

Document Summary

Mechanism of inheritance unknown unil 20th century. Darwin (1809-1882) didn"t know genes and chromosomes. Trait: a detectable variant of a character (ex: red hair, blond hair, etc. ) Background: first to determine basic rules of inheritance in eukaryotes, foundaion of geneics. Easy to control pollinaion: stamen (male) & carpel (female, normally self-ferilize, stamens removed by mendel to prevent self-ferilizaion, pollen transferred by hand. Characters used: table 14. 1, know that for each character there are two diferent traits that can be difereniated by simply looking at plant. Applies quanitaive methods: used an experimental approach, documented protocols critical, recorded data. Developed true-breeding lines: true-breeding: always express the same trait ater self-ferilizaion, no excepions, all individuals of a true-breeding line have the same characterisics (same phenotype, 2 years of true-breeding before staring experiments. Blending inheritance hypothesis: gametes contain sampling luids from parents" bodies, fuse during reproducion-- luids blend, ofspring is intermediate, this was prevailing idea in mid- 1800s.