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Punnett Square Practice Problems Level 1 Analysis of Crosses Involving One Trait.

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Presentation on theme: "Punnett Square Practice Problems Level 1 Analysis of Crosses Involving One Trait."— Presentation transcript:

1 Punnett Square Practice Problems Level 1 Analysis of Crosses Involving One Trait

2 Spider Bodies Dominant allele: Hairy (H) Recessive allele: Bald (h) Male: Heterozygous Genotype_______ Phenotype_______ Female: Heterozygous Genotype_______ Phenotype_______ Make a Punnett square to predict the offspring.

3 Spider Bodies What genotypes are possible in the F1 generation? What phenotypes are possible in the F1 generation? What is the genotypic ratio of this cross? What is the phenotypic ratio of this cross?

4 Butterfly Wings Dominant allele: Striped (S) Recessive allele: Spotted (s) Male: Homozygous recessive Genotype_______ Phenotype_______ Female: Homozygous dominant Genotype_______ Phenotype_______ Make a Punnett square to predict the offspring.

5 Butterfly Wings What genotypes are possible in the F1 generation? What phenotypes are possible in the F1 generation? What is the genotypic ratio of this cross? What is the phenotypic ratio of this cross?

6 Maple Tree Trunks Dominant allele: Thick (T) Recessive allele: Thin (t) Male: Homozygous dominant Genotype_______ Phenotype_______ Female: Heterozygous Genotype_______ Phenotype_______ Make a Punnett square to predict the offspring.

7 Maple Tree Trunks What genotypes are possible in the F1 generation? What phenotypes are possible in the F1 generation? What is the genotypic ratio of this cross? What is the phenotypic ratio of this cross?

8 Flamingo Beaks Dominant allele: Pointy (B) Recessive allele: Rounded (b) Male: Heterozygous Genotype_______ Phenotype_______ Female: Homozygous Genotype_______ Phenotype_______ Make a Punnett square to predict the offspring.

9 Flamingo Beaks What genotypes are possible in the F1 generation? What phenotypes are possible in the F1 generation? What is the genotypic ratio of this cross? What is the phenotypic ratio of this cross?

10 Leopard Spots Dominant allele: Even number (E) Recessive allele: Odd number (e) Male: Homozygous dominant Genotype_______ Phenotype_______ Female: Homozygous recessive Genotype_______ Phenotype_______ Make a Punnett square to predict the offspring.

11 Leopard Spots What genotypes are possible in the F1 generation? What phenotypes are possible in the F1 generation? What is the genotypic ratio of this cross? What is the phenotypic ratio of this cross?

12 Pig Tails Dominant allele: Curly (T) Recessive allele: Straight (t) Male: Heterozygous Genotype_______ Phenotype_______ Female: Heterozygous Genotype_______ Phenotype_______ Make a Punnett square to predict the offspring.

13 Pig Tails What genotypes are possible in the F1 generation? What phenotypes are possible in the F1 generation? What is the genotypic ratio of this cross? What is the phenotypic ratio of this cross?

14 Moose Antlers Dominant allele: Large (L) Recessive allele: Small (l) Male: Homozygous recessive Genotype_______ Phenotype_______ Female: Heterozygous Genotype_______ Phenotype_______ Make a Punnett square to predict the offspring.

15 Moose Antlers What genotypes are possible in the F1 generation? What phenotypes are possible in the F1 generation? What is the genotypic ratio of this cross? What is the phenotypic ratio of this cross?

16 BEAR CLAWS Dominant allele: Sharp (S) Recessive allele: Dull (s) Male: Heterozygous Genotype_______ Phenotype_______ Female: Heterozygous Genotype_______ Phenotype_______ Make a Punnett square to predict the offspring.

17 BEAR CLAWS What genotypes are possible in the F1 generation? What phenotypes are possible in the F1 generation? What is the genotypic ratio of this cross? What is the phenotypic ratio of this cross?


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