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Unformatted text preview: 1 Gregor Mendel, 1822-1884 Fig. 2.7 Mendel: the frst to apply a quantitative experimental approach to understand the laws o¬° inheritance model organism: the garden pea-sel¬°-¬°ertilization as well as cross-¬°ertilization-rapid growth cycle-discrete traits Mendel ‚Äô s law o¬° segregation: The two alleles ¬°or each trait separate during gamete ¬°ormation, and then unite at random at ¬°ertilization Fig. 2.10 haploid : containing a single set o¬° chromosomes genome : the genetic content o¬° a cell diploid : containing two copies o¬° the genome genetic cross : the deliberate mating o¬° two organisms allele : a ¬°orm o¬° a single gene gene : the basic unit o¬° genetic in¬°ormation and inheritance 2 Fig. 2.11 P = the parental organisms, or the parental generation F 1 = the offspring of the parental organisms (¬°rst ¬°lial generation) F 2 = the offspring resulting from a self-cross of the F 1 (second ¬°lial generation) genotype = alleles present in an organism phenotype = expression of alleles as a measurable trait...
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- Fall '08
- Genetics, purple stem plants