Warm Up Dihybrid Crosses Parents are both heterozygous

Warm Up: Dihybrid Crosses Parents are both heterozygous tall tusk’s and gray in color. � T=tall tusk � t= short tusk � G= Gray in color � g= Blue in color � � � Create a Dihybrid Cross for this scenario

Day 4 Non-Mendelian Inheritance ESSENTIAL QUESTION: How do genes influence the variety of organisms that exist?

Incomplete Dominance -Neither allele is completely dominant or recessive. heterozygous will be a blend of Wait!The This should have been RED, the two alleles. RR: Red but incomplete dominance makes it. Rr: pink rr: white

Incomplete Dominance Monohybrid Parents are both heterozygous pink. Rr P 1 ______ Offspring Genotype X R Rr r 1 RR : 2 Rr : 1 rr Offspring Phenotype 1 Red : 2 Pink : 1 White R Rr rr

Codominance Monohybrid � This is when both alleles are expressed fully and separately.

Codominance Monohybrid Parents are both heterozygous for black & BW white feathers. P 1 ______ Offspring Genotype 1 BB : 2 BW : 1 WW Offspring Phenotype 1 Black 2 Black & White 1 White X BW B BB BW WW

Codominance Monohybrid

Polygenic Inheritance �A trait produced by two or more genes that each contribute to the same phenotype. Gene Name Dominant Allele Recessive Allele BEY 1 brown blue BEY 2 brown blue GEY green blue