HETEROZYGOUS or HOMOZYGOUS? 1. GG 2. Ll 3. tt 4. Yy 5. RR 6. Ee Station 1 For each genotype, indicate whether it is… For each genotype, indicate which trait will show up, the… HETEROZYGOUS or HOMOZYGOUS? 1. GG 2. Ll 3. tt 4. Yy 5. RR 6. Ee DOMINANT or RECESSIVE? 1. GG 2. Ll 3. tt 4. Yy 5. RR 6. Ee

Station 2 Show the cross between a homozygous recessive parent and a hybrid parent for the trait fur color: B – Brown, b – white Cross _____ _____ ___ ___ ___ ___ Genotypes: Phenotypes: Genotype Ratio: Phenotype Ratio:

Station 3 Show the cross between a purebred tall parent and a purebred short parent: T = tall, t = short Cross _____ _____ ___ ___ ___ ___ Genotypes: Phenotypes: Genotype Ratio: Phenotype Ratio:

Station 4 Show the cross between a purebred dominant parent and a hybrid parent for the trait fur color B = black, b = white Cross _____ _____ ___ ___ ___ ___ Genotypes: Phenotypes: Genotype Ratio: Phenotype Ratio:

Station 5 Show the cross between two parents who are heterozygous for floppy ears. F = floppy ears, f = pointy ears Cross _____ _____ ___ ___ ___ ___ Genotypes: Phenotypes: Genotype Ratio: Phenotype Ratio:

Station 6 Pea plants can have two possible seed textures, round which is dominant and wrinkled which is recessive. Use the following code: R = Round, r = wrinkled List all the possible parent crosses. (there are 6) For example: RR x RR

What are the genotypes of my parents? Station 7 Can you tell the genotype of the PARENTS of these fish, based on the offspring ratio? (what parent cross led to each group?) B = black , b = white Group 1 Group 2 What are the genotypes of my parents?

Station 8 P RD Rd rD rd RRDD RRDd RrDD RrDd RRdd Rrdd ? rrDD rrDd RrRd This is a DIHYBRID cross, it shows the Punnett square for two traits at a time. For this example, the two traits are for color and pattern of a snakes skin. R = red, r = white D = diamonds, d = no diamonds P RD Rd rD rd RRDD RRDd RrDD RrDd RRdd Rrdd ? rrDD rrDd RrRd rrdd Based on the rest of the boxes, and the way you fill in a Punnett square, predict the genotype of the offspring with the ? Predict the phenotype of the offspring with the ? (remember, it should have 2 traits) Describe (in full sentences) how this is different than the Punnett squares we’ve done so far in class.