Incomplete and CoDominance

It's a good thing Gregor Mendel studied pea plants, because peas follow the rules of complete dominance. Traits that follow complete dominance are known as Mendelian Traits. However, not all traits follow those simple rules. In class today we learned about to different types of Non-Mendelian traits, incomplete dominance and codominance. If you need a refresher on these concepts, check out the video to the right.

Gold Tape Question: This week's Gold Tape question is worth two pieces of Gold Tape! Turn in your work on Monday or send a picture of it to [email protected]

Question: In Sponges Yellow (Y) is dominant to blue (y) and Square (S) is dominant to round (s). SpongeBob is heterozygous for his yellow color and square shape (YySs) and SpongeSusie is heterozygous for her yellow color and round (Yyss). Use a dihybrid cross to determine the phenotype and genotype percent (or ratio) possibilities of all offspring.