GENETICS! The science of heredity. Foundation of Genetics Monohybrid cross—single-trait cross Dihybrid cross—double-trait cross.

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Presentation transcript:

GENETICS! The science of heredity

Foundation of Genetics Monohybrid cross—single-trait cross Dihybrid cross—double-trait cross

Gregor Mendel Father of genetics Studied inheritance in PEA PLANTS

F 1 Results of One Monohybrid Cross

F 2 Results of Monohybrid Cross

Flower Color: Mendel A = purple a = white Homozygous parent—AA or aa Heterozygous parent– Aa When A present flower will be purple (dominant allele)

Mendel’s Conclusions Genotype—the combination of alleles carried by an organism (AA, Aa, aa) Phenotype—observable traits of an organism (purple or white) Mendel was able to predict outcome of crosses Punnett Square—tool to predict outcome of crosses (genotype and phenotype)