Take out your white and green genetics worksheets for check off. Biology 11/29 + 11/30 Prepare for a warm-up! Take out your white and green genetics worksheets for check off.

Warm-Up 11/29 and 11/30 In humans, achondroplasia (dwarfism) is dominant. What are the three possible genotypes someone can have? (you choose the letter) What are the possible genotype(s) of someone with dwarfism?

Learning Targets I can use a Punnett Square to predict offspring probabilities I can carry out an experiment to explore dominant and recessive genes in yeast.

Punnett Square Practice Check your work!

Yeast Lab When we mate different yeast parents, which traits show up and why?

Background Knowledge Read pages 338-339 and answer the questions on the handout.

Yeast Lab Background Information Yeast are Fungi. Yeast are single celled and eukaryotic. Yeast have mating types instead of sexes. Mating types are “a” and “alpha”. A deliberate mating is called a CROSS. There are many strains of yeast. Strain 2 = pinkish red colored (both the a2 and alpha2) Strain 3 = cream colored (both a3 and alpha3

Yeast Lab Hypothesis and Data Draw a mating grid in your hypothesis circle. Predict, in color, what will happen. Explain why. First set of parents Alpha2 (red) Alpha3 (cream) a2 a3 Second set of parents

Materials Sharpie Petri dish Waste cup Toothpicks Class yeast- 4 plates (alpha 2, a2, alpha3, a3)

Done? Move on to the Punnett Square practice Required: page one Optional: watch dihybrid cross video and do page 2. https://www.youtube.com/watch?v=qIGXTJLrLf8