Handwritten dihybrid cross problems with Punnett squares and genetic trait analysis for dogs and guinea pigs.

A handwritten worksheet on dihybrid cross problems using Punnett squares, with red annotations and solutions for genetics questions involving dog barking and ear traits, and guinea pig coat and hair traits.

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Show Answer Key & Explanations Step-by-step solution for: Dihybrid Cross Problems: | Lecture notes Genetics | Docsity

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- Problem 1:
- Parental Genotypes: SsBb x ssbb
- Gametes from SsBb: SB, Sb, sB, sb
- Gametes from ssbb: sb (only one type)
- Punnett Square Offspring Genotypes: SsBb, Ssbb, ssBb, ssbb (each 1/4)
- Phenotypic Ratio: 1 Standing Eared Barker : 1 Standing Eared Silent : 1 Droopy Eared Barker : 1 Droopy Eared Silent
- Genotypic Ratio: 1 SsBb : 1 Ssbb : 1 ssBb : 1 ssbb

- Problem 2:
- Parental Genotypes: RRSS x rrss
- Gametes from RRSS: RS (only one type)
- Gametes from rrss: rs (only one type)
- Punnett Square Offspring Genotype: All RrSs
- Phenotypic Ratio: All Rough, Short Coat (1:0)
- Genotypic Ratio: All RrSs (1:0)

Parent Tip: Review the logic above to help your child master the concept of dihybrid cross worksheet answers.

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