BIOL 112 Lecture Notes - Lecture 3: Meiosis, Zygote, Zygosity

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BIOL 112 Full Course Notes
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BIOL 112 Full Course Notes
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For a given character (color, stature, facial features etc. ) offspring share traits (light or dark color; short or tall stature) with their parents: siblings will not have identical traits for a given character. Infinite number of traits fro a given character that fall along a continuous spectrum (i. e. height, skin color). There are only two or a few traits for a given character. (fur color in mice) Mendel tested this by crossing peas, which resulted in may progeny, so that he could do statistics. And starting with a trait that bred true; as long as he bred a stain with itself, all the progeny had the same traits for the characters: mendel used true-breeding strains. A round pea plant that always gave round peas when fertilizing itself. A wrinkled pea plant that likewhise always gave wrinkled peas: gene = unit of heredity (pea shape, alleles = different gene flavors (round, wrinkled traits)

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