BIL 150 Lecture Notes - Lecture 15: Zygosity, Mutation, Punnett Square
24 Oct 2016
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Document Summary
Characteristic of mother and father will blend. Characteristics get passed on in discrete particles (genes). Hybridization of contrasting, true-breeding white and purple flowered pea plants, all of the f1 hybrids were purple. When mendel crossed the f1 hybrids, many of the f2 plants had purple flowers, but some had white petals. Mendel discovered a ratio of about three to one, purple to white flowers, in the f2 generation. Developed hypothesis to explain the 3:1 ratio. Alleles: alternative versions of gees account for variations in inherited characters. Diploid: for each character, an organism inherits two alleles, one from each parent. Dominance: it two allele at a locus different, then the dominant allele determines the organism"s appearance, and the recessive allele has no noticeable effect on appearance. Law of segregation: the two alleles for a heritable character separate (segregate) during gamete formation and end up in different gametes. First: alternative versions of genes account for variations in inherited characters.
