Presentation on theme: "Warm-up: 12/9 With Pea Plants which is dominant, purple flower or white flower? What does P1 generation mean? What does purebred mean For flower color."— Presentation transcript:
1 Warm-up: 12/9With Pea Plants which is dominant, purple flower or white flower?What does P1 generation mean?What does purebred meanFor flower color what does the F1 generation look like in terms of dominant vs recessive trait?
3 Mendel’s Experiment Review: Grew plants for pure traits (i.e. purple always produces purple) via self-pollination to make a pure strain (P1 generation)Cross-pollination of pure strains (P cross)PFP with WFPCounted the offspring (F1 generation)Self-pollination of the F1 generation to create the F2 generation
6 Mendel’s resultsOne trait was masked by a dominant factor and the trait that did not appear (in F1 but did in F2) was recessiveTrait controlled by a recessive factor is masked when paired with a dominant
7 Chromosomes and genesGene (located on a chromosome) codes for a characteristic (ie flower color)Different forms of a gene = allele (purple or white)Letters used to represent allelesdominant trait capitalized (purple = P)recessive lower case (white = p)
8 Genotypes and Phenotypes Genotype: alleles an organism inheritsEX: PP Pp ppPhenotypes: appearance due to the genotypeEX: PP (purple) Pp (purple) pp (white)Homozygous: both alleles are alike (PP or pp)Heterozygous: alleles are different