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Warmup. When you think about the words pedigree, blue-blooded royalty, bloodline, or heritage, what comes to mind?. Pedigrees. SEPTEMBER 30, 2009.
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Warmup When you think about the words pedigree, blue-blooded royalty, bloodline, or heritage, what comes to mind?
Pedigrees SEPTEMBER 30, 2009
A farmer needs new chickens, and pairs a red-brown hen with a black rooster. The offspring are all brown-black. What genotype are the parents, and what can you say about the feather color trait? Test Practice • BB and Bb, dominant-recessive • Bb and Bb, co-dominant • BB and bb, dominant-recessive • Bb and Bb, dominant-recessive • BB and Bb, co-dominant • None of the above
Double Punnit Square A pea plant can have genes for pod shape (P for pointy, p for round) and flower color (R for red, r for white). The flower gene shows co-dominance. Parents: PPRr, PpRr
Pedigree Squares = male Circles = female Horizontal lines = siblings or married Vertical lines = offspring below, parents above
Pedigree Analysis Learn what to look for in each type of pattern. Regular Genes: Dominant/Recessive vs. Codominant Sex-Linked Genes: Dominant Recessive