biol1201 notes march11

biol1201 notes march11 - 3/11/08 How many different alleles...

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How many different alleles can a diploid individual have at a single gene locus if there are 4 alleles in the population? o 2 When does Mendelian segregation occur? o Anaphase I Homozygote: o aa and AA Genotype: o PP or Pp The ___ determines the ____. o Genotype, phenotype In a cross between heterozygous purple-flowered peas ___ of the offspring will be heterozygous? o 50% In a test cross, what is the phenotype of the unknown individual? o Dominant In a test cross, if the unknown is heterozygous, the offspring phenotypes will be o __ In a test cross, if the unknown is homozygous, the offspring phenotypes will be o All dominant 1. Gregor Mendel (Pgs. 251-255) a. Born 1822 b. Monk at the monastery of St. Thomas in Czech Republic c. Trained in botany, mathematics, and psychics at the University of Vienna (1851-1853) d. 1966 published his work “Experiments with Plant Hybrids” e. 1900 Mendel’s work was rediscovered by Hugo de Vries in Holland, Carl Correns in Germany and Erich von Tschermak in Austria f. Worked with edible pea plants i. There was a long history of previous work on peas ii. Why did Mendel succeed and others fail? g. Mendel’s ideas: i. “Particulate” rather than “blending” inheritance ii. Mendel’s First Law 1. The two members of a gene pair segregate (separate) from each other into the gametes. 2. Each gamete carries one member of the gene pair. 3. When does Mendelian Segregation occur? a. When do homologous chromosomes separate? i.
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biol1201 notes march11 - 3/11/08 How many different alleles...

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