Station 1

HETEROZYGOUS or HOMOZYGOUS?

1. GG2. Ll3. tt4. Yy5. RR6. Ee

DOMINANT or RECESSIVE?

1. GG2. Ll3. tt4. Yy5. RR6. Ee

For each genotype, indicate whether it is… For each genotype, indicate which

trait will show up, the…

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 2

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 3

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 4

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 5

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 = wrinkledList all the possible parent crosses. (there are 6)For example: RR x RR

Station 7Can 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 = whiteGroup 1 Group 2What are the

genotypes of my parents?

Station 8

P RD Rd rD rd

RD RRDD RRDd RrDD RrDdRd RRDd RRdd RrDd RrddrD RrDD ? rrDD rrDdrd RrRd Rrdd rrDd rrdd

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 = whiteD = diamonds, d = no diamonds

1. Based on the rest of the boxes, and the way you fill in a Punnett square, predict the genotype of the offspring with the ?

2. Predict the phenotype of the offspring with the ? (remember, it should have 2 traits)

3. Describe (in full sentences) how this is different than the Punnett squares we’ve done so far in class.