Look at the Parent and F1 generation above Look at the Parent and F1 generation above. Predict possible genotypes for the parent flowers. Draw a Punnett Square to demonstrate the possible offspring and what their phenotypes should be.

**A blending effect occurs**

Red flower x white flower → pink flowers Incomplete Dominance Neither allele completely dominant Heterozygous genotype somewhere between homozygous phenotypes (blending) Example: Red flower x white flower → pink flowers

Examples… Mike Wazowski is a resident of Monsters, Inc. Land. His Dad is BB for blue color His Mom is YY for yellow color What do you think Mike’s genotype is??? What does this mean about inheritance of skin color in this species of monster?

Codominance Both alleles contribute to phenotype See both phenotypes in offspring Examples: Black x white chicken → speckled chicken

Examples… The Wiley Coyote Bird of the deserts has a black and red stripes on its body. Homozygous BB is black stripes only Homozygous RR is red stripes only Heterozygous BR is ???

Red horse x white horse results in ROAN – both colors expressed Examples… x Red horse x white horse results in ROAN – both colors expressed

Multiple Alleles Genes that are controlled by more than 2 alleles Example: Rabbit coats – 29 different alleles determine coloration

Ex: Blood Types

Polygenic Traits Traits controlled by interactions between 2 or more genes Different combos, diff phenotypes Example: Skin color Height

Sex Linkage Ex: Color-blindness Gene carried on X - more males than females. Why? * Males – XY * Females – XX Males have ONE X → ALL x-linked traits are expressed even if they are recessive Second X can mask trait in females

Trait: Sight: Normal – E colorblind – e Gender: Male – Y Female – X Normal Vision Male: XEY Carrier Female: XEXe

Disorder in which blood does not clot normally Example: Hemophilia Disorder in which blood does not clot normally