BIO152H5 Lecture Notes - Lecture 6: Phenotype, Selective Breeding, Zygote

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30 Sep 2016
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Lecture 6: Introduction to Genetics
-Midterms, each is 40 multiple choice in 40 minutes.
-Genetics is linked to meiosis.
-People have been breeding domesticated animals/plants for quite some time.
-What is the mechanism of passing traits from parent to offspring.
-The blending hypothesis involves the complete combination of both parents’ traits.
-A black and white pair of rabbits will produce a grey offspring. The black and white traits will never
appear again in further generations.
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-An Austrian monk, who studied biology, chemistry, and math. He used math and statistics to explain his
observations during his breeding experiments.
-His hypothesis was the particulate hypothesis of inheritance, involving the fact that parents have discreet
separate units of heritable information that will be transmitted to offspring in whole.
-Plants self-pollinate, as each flower has both male and female reproductive units.
-Cross-pollination involves wind, bees, or artificial selection.
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-Genes had not been labelled during Mendel’s time, but he did have an alternate name for them. He was
aware of them. “Particulate pieces of heritable information.”
-He wanted to make sure that his pea plants, if they were true-breeding, they would always produce
offspring like themselves via self-pollination.
-Hybridization involves organisms with varying traits.
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