BSC 1010C Lecture Notes - Lecture 33: Dihybrid Cross, Dosage Compensation, Mendelian Inheritance

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3 Apr 2018
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Chose pea plants bc characters were discrete, not linked. Segregation: two alleles and arch seperates during gamete formation. If you take two true breeding (homo dominant or recessive) the phenotypic ratio is 3:1 but genotype 1:2:1. Test cross is used to nd genotype of unknown organism, crossed with recessive homozygous and can nd genotype of parents. Law of independent assortment: when you take two or more genes with di erent traits, each trait is passed on independently (wrinkled seed an color for ex), the two traits with go independently to gamete. developed by unlinked dihybrid cross. Not all traits go by mendel codominance: both alleles will be expressed, under heterozygous conditions. Incomplete dominance: dominant will not completely show it, it will be blended. Pedigree analysis: how recessive and dominant characteristics are passed down. (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) Disease: only when homozygous dominant will be expressed.

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