BIOL 1000 Lecture Notes - Lecture 35: Gynoecium
13 May 2017
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Heredity = transmission of traits from one generation to the next . Gregor mendel was the father of genetics bred garden peas . Parents pass on to their offspring discrete heritable factors . Heritable factors (genes) retain their individuality generation after generation o. Genes may be rearranged but each gene permanently retains its identity . Garden peas have short generation times, produce large numbers of offspring from each mating and came in readily distinguishable varieties . Character = a heritable feature that varies among individuals (e. g. flower colour) . Trait = each variant for a character (e. g. purple vs. white flowers) . Self-fertilize = sperm-carrying pollen grains released from the stamens land on the egg-containing carpel of the same flower . Cross-fertilization = fertilization of one plant by pollen from a different plant . Prevent self-fertilization by cutting off immature stamens of a plant before they produce pollen. Cross-fertilize stamen-less flowers by dusting its carpel with pollen from another plant.
