BIOL 1201 : Biology 1201 Exam 3 Study Guide And Notes
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Parents pass on discrete heritable units (genes) Can explain the reappearance of traits after several generations. Mendel documented a particulate mechanism through his experiments with garden peas. Traits: character variants (such as purple or white flowers) Each flower has sperm-producing organs (stamens) and an egg-producing organ (carpel) Involves dusting one plant with pollen from another. Discovered the basic principles of heredity by breeding garden peas in carefully planned experiments. Chose to track only those characters that occurred in two distinct alternative forms. True-breeding: plants that produce offspring of the same variety when they self-pollinate. Hybridization: mating two contrasting, true-breeding varieties, p generation parental, f1 generation hybrid offspring, f2 generation when f1 individuals self-pollinate or cross- pollinate with other f1 hybrids. Mendel developed a hypothesis to explain the 3:1 inheritance pattern he observed in f2 offspring. Four related concepts make up this model. These concepts can be related to what we now know about genes and chromosomes.
