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Punnett Square Practice Problems

Punnett Square Practice Problems. Level 1 Analysis of Crosses Involving One Trait. Spider Bodies. Dominant allele: Hairy (H) Recessive allele: Bald (h) Male: Heterozygous Genotype_______ Phenotype_______ Female: Heterozygous Genotype_______ Phenotype_______

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Punnett Square Practice Problems

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  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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