PSYC 2410 Chapter Notes -Knockout Mouse, Gene Knockout, James Watson
1 Aug 2013
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Observed features of many plants and collected information about how they were transmitted across generations (studied inheritance) Dichotomous traits: traits that come in 1 of 2 versions and never in combination. E. g. in peas, seed colour (brown, white), seed appearance (rough, smooth), flower colour (purple, white) True breeding lines: breed individuals of same characteristic studying, produce offspring with same trait generation after generation. Gene: trait is carried by sequence of dna that codes for characteristic, there are two kinds of inherited factors for each dichromatic trait (maternal / paternal) Alleles: different versions of genes for same trait (e. g. blue and brown eyes) Cross fertilized brown and white peas (true breeds) Observed that in first generation all offspring were brown. Therefore brown allele is dominant over white allele: brown dominant trait (e. g. brown eyes in humans, white recessive trait (e. g. blue eyes in humans) Observed offspring brown and white offspring: challenged view that offspring inherit the traits of their parents.
