Biology 1201A Chapter Notes - Chapter 10: Punnett Square, Gynoecium, Gamete
Document Summary
Mendel prevented self-fertilization by cutting off anthers to produce, pollen had to come from a different plant (cross-pollination: tests effects of mating on different parental types. Mendel pollinated selected plants with characteristics of interest and grew new plants from the seeds that were produced. He conducted what is now called monohybrid cross using pure breeding plants -- so the trait always resembles their parents. Breaded pure breeding yellow and pure breeding green -- in the first generation he noticed all of the plants were yellow (yellow= dominant) Next generation, yellow peas self-fertilize and got both yellow (3) and green (1) pea (3:1) Flower position- terminal (along stems) or axial (at tips) Monohybrid: an offspring of parents with different traits: pp x pp. Dihybrid cross: cross between to individuals that are heterozygous for 2 pairs of alleles: ry yy x rr yy, 9:3:3:1 ratio was consistent shows that they do not assort independently.
