Mendelian Genetics Part 2

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Presentation transcript:

Mendelian Genetics Part 2 AP Biology Mendelian Genetics Part 2

Phenotype by gene expression

3’ T A C C A G C C G G T A A T A G G G A C C A T T 5’ DNA TEMPLATE 5’ A U G G U C G G C C A U U A U C C C U G G U A A 3’ mRNA METH VAL GLY __ HIST TYR __ PRO TRP __ __ ___ ___ PROTEIN 3’ U A C C A G C C G G U A A U A G G G A C C A U U 5’ ANTI – CODON Sequence Does the DNA Sequence (Million Dollar Blueprint) look like the Anti-codon Sequence? Remember, this is how the ribosome “knew” the Amino Acid was Correct.

Incomplete Dominance

Complete Dominance

Codominance (AB) & Multiple Alleles

Pleiotropy (Sickle Cell)

Epistasis BbCc BbCc Sperm BC bC Bc bc BC BBCC BbCC BBCc BbCc bC BbCC 1 BC 1 bC 1 Bc 1 4 4 4 4 bc 1 BC 4 BBCC BbCC BBCc BbCc 1 bC BbCC 4 bbCC BbCc bbCc 1 4 Bc BBCc BbCc BBcc Bbcc 1 bc BbCc bbCc Bbcc bbcc 4 9 3 4 16 16 16

Dihybrid – Normal 9:3:3:1 ratio

Polygenic Inheritance & Norm of the Reaction AaBbCc AaBbCc aabbcc Aabbcc AaBbcc AaBbCc AABbCc AABBCc AABBCC 20/64 15/64 Fraction of progeny 6/64 1/64

Multifactorial example (Acid in soil changes the color)

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