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Dihybrid crosses. A pea plant that is heterozygous for seed form and flower color is crossed with a heterozygous seed shape and white flower plant. Predict the geno- and the phenotype of the first filial (F1) generation. (Use a Punnet table.) type

Dihybrid crosses. A pea plant that is heterozygous for seed form and flower color is crossed with a heterozygous seed shape and white flower plant. Predict the geno- and the phenotype of the first filial (F1) generation. (Use a Punnet table.) type

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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**Mendelian Genetics - Lab 10** **What is the allele combination of the plant with yellow seeds?** (Use Punnett tables to explain your answers.) --- **Situation 2:** Suppose that the same cross produced 50% heterozygous yellow seeds and 50% homozygous green seeds. What is the allele combination of the original plant now? --- **6. Dihybrid Crosses:** A pea plant that is heterozygous for seed form and flower color is crossed with a heterozygous seed shape and white flower plant. Predict the genotype and the phenotype of the first filial (F1) generation. (*Use a Punnett table.*) **Punnett Square Explanation:** The Punnett square shows the results of a dihybrid cross between two heterozygous pea plants. The alleles considered are for seed shape (S for smooth, s for wrinkled) and flower color (P for purple, p for white). - **Parental Genotypes:** - One parent: SsPp - Other parent: Sspp - **Outer circles show parental gametes:** - Top: SP, Sp, sP, sp - Side: Sp, sp - **Punnett Square Results:** - Combination squares inside the Punnett square display possible genotype outcomes such as SSPp, SsPp, ssPp, etc. - This predicts a variety of combinations involving the traits for seed shape and flower color. **Page 115**
Transcribed Image Text:**Mendelian Genetics - Lab 10** **What is the allele combination of the plant with yellow seeds?** (Use Punnett tables to explain your answers.) --- **Situation 2:** Suppose that the same cross produced 50% heterozygous yellow seeds and 50% homozygous green seeds. What is the allele combination of the original plant now? --- **6. Dihybrid Crosses:** A pea plant that is heterozygous for seed form and flower color is crossed with a heterozygous seed shape and white flower plant. Predict the genotype and the phenotype of the first filial (F1) generation. (*Use a Punnett table.*) **Punnett Square Explanation:** The Punnett square shows the results of a dihybrid cross between two heterozygous pea plants. The alleles considered are for seed shape (S for smooth, s for wrinkled) and flower color (P for purple, p for white). - **Parental Genotypes:** - One parent: SsPp - Other parent: Sspp - **Outer circles show parental gametes:** - Top: SP, Sp, sP, sp - Side: Sp, sp - **Punnett Square Results:** - Combination squares inside the Punnett square display possible genotype outcomes such as SSPp, SsPp, ssPp, etc. - This predicts a variety of combinations involving the traits for seed shape and flower color. **Page 115**
**Problem 4**: Find the genotype and the phenotype of the first filial generation (F1) when a homozygous spherical pea plant is crossed with a plant with wrinkled seeds. **Hint**: Write the genotype of the gametes for both plants, arrange them in a Punnett table, cross the gametes, and find the answer. **Problem 5**: In a test cross, an individual that is dominant for a certain trait is crossed with a homozygous recessive individual. The purpose of this test cross is to determine if the second allele of the individual with the dominant phenotype is dominant (SS) or recessive (Ss). A plant with yellow seeds is test-crossed with another plant. Consider the following possible outcomes: **Situation 1**: The genotypes and phenotypes of the offspring are 100% heterozygous and 100% dominant.
Transcribed Image Text:**Problem 4**: Find the genotype and the phenotype of the first filial generation (F1) when a homozygous spherical pea plant is crossed with a plant with wrinkled seeds. **Hint**: Write the genotype of the gametes for both plants, arrange them in a Punnett table, cross the gametes, and find the answer. **Problem 5**: In a test cross, an individual that is dominant for a certain trait is crossed with a homozygous recessive individual. The purpose of this test cross is to determine if the second allele of the individual with the dominant phenotype is dominant (SS) or recessive (Ss). A plant with yellow seeds is test-crossed with another plant. Consider the following possible outcomes: **Situation 1**: The genotypes and phenotypes of the offspring are 100% heterozygous and 100% dominant.
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