In pea plants, spherical seeds (R) are dominant to dented seeds (r)
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CHALLENGING GENETIC PROBLEMS. For each problem: identify parents’ genotypes, draw Punnett square and answer the questions In pea plants, spherical seeds (R) are dominant to dented seeds (r). In a genetic cross of two plants that are heterozygous for the seed shape trait. 1. What fraction of the offspring would have spherical seeds? 2. In humans, a dimple in the chin (D) is dominant over no dimples in the chin. A man who does not have a chin dimple marries a woman with a chin dimple, whose mother lacked the dimple. What proportion of their children would be expected to have a chin dimple? What is the phenotypic ratio for dimples? ======================================================================================= CHALLENGING GENETIC PROBLEMS. For each problem: identify parents’ genotypes, draw Punnett square and answer the questions 1 In pea plants, spherical seeds (R) are dominant to dented seeds (r). In a genetic cross of two plants that are heterozygous for the seed shape trait. What fraction of the offspring would have spherical seeds? 2 In humans, a dimple in the chin (D) is dominant over no dimples in the chin. A man who does not have a chin dimple marries a woman with a chin dimple, whose mother lacked the dimple. What proportion of their children would be expected to have a chin dimple? What is the phenotypic ratio for dimples? =============================================================================================== CHALLENGING GENETIC PROBLEMS. For each problem: identify parents’ genotypes, draw Punnett square and answer the questions 1 In pea plants, spherical seeds (R) are dominant to dented seeds (r). In a genetic cross of two plants that are heterozygous for the seed shape trait. What fraction of the offspring would have spherical seeds? 2 In humans, a dimple in the chin (D) is dominant over no dimples in the chin. A man who does not have a chin dimple marries a woman with a chin dimple, whose mother lacked the dimple. What proportion of their children would be expected to have a chin dimple? What is the phenotypic ratio for dimples? ================================================================================================== CHALLENGING GENETIC PROBLEMS. For each problem: identify parents’ genotypes, draw Punnett square and answer the questions 1 In pea plants, spherical seeds (R) are dominant to dented seeds (r). In a genetic cross of two plants that are heterozygous for the seed shape trait. What fraction of the offspring would have spherical seeds? 2 In humans, a dimple in the chin (D) is dominant over no dimples in the chin. A man who does not have a chin dimple marries a woman with a chin dimple, whose mother lacked the dimple. What proportion of their children would be expected to have a chin dimple? What is the phenotypic ratio for dimples? ============================================================================================= CHALLENGING GENETIC PROBLEMS. For each problem: identify parents’ genotypes, draw Punnett square and answer the questions 1 In pea plants, spherical seeds (R) are dominant to dented seeds (r). In a genetic cross of two plants that are heterozygous for the seed shape trait. What fraction of the offspring would have spherical seeds? 2 In humans, a dimple in the chin (D) is dominant over no dimples in the chin. A man who does not have a chin dimple marries a woman with a chin dimple, whose mother lacked the dimple. What proportion of their children would be expected to have a chin dimple? What is the phenotypic ratio for dimples? 3 A phenotypic ratio of 3:1 in the offspring of a mating of two organisms must stem from the 4 marriage of what type of genotypic parents? _____________________________________________ When a plant with yellow seeds (dominant) is crossed with a green-seeded plant, some of the offspring is green-seeded What are the genotypes of the parents? What are the genotypes of the offspring? What is the phenotypic ratio of the offspring? 5 Trait fuzzy-skinned fruit (F) is dominant; smooth-skinned fruit (f) is recessive. All offsprings have fuzzy fruits. What are possible parents’ genotype and phenotype? 3 A phenotypic ratio of 3:1 in the offspring of a mating of two organisms must stem from the marriage of what type of genotypic parents? _____________________________________________ 4 When a plant with yellow seeds (dominant) is crossed with a green-seeded plant, some of the offspring is green-seeded 5 3 4 What are the genotypes of the parents? What are the genotypes of the offspring? What is the phenotypic ratio of the offspring? Trait fuzzy-skinned fruit (F) is dominant; smooth-skinned fruit (f) is recessive. All offsprings have fuzzy fruits. What are possible parents’ genotype and phenotype? A phenotypic ratio of 3:1 in the offspring of a mating of two organisms must stem from the marriage of what type of genotypic parents? _____________________________________________ When a plant with yellow seeds (dominant) is crossed with a green-seeded plant, some of the offspring is green-seeded What are the genotypes of the parents? What are the genotypes of the offspring? What is the phenotypic ratio of the offspring? 5 Trait fuzzy-skinned fruit (F) is dominant; smooth-skinned fruit (f) is recessive. All offsprings have fuzzy fruits. What are possible parents’ genotype and phenotype? 3 A phenotypic ratio of 3:1 in the offspring of a mating of two organisms must stem from the marriage of what type of genotypic parents? _____________________________________________ When a plant with yellow seeds (dominant) is crossed with a green-seeded plant, some of the offspring is green-seeded 4 5 3 4 What are the genotypes of the parents? What are the genotypes of the offspring? What is the phenotypic ratio of the offspring? Trait fuzzy-skinned fruit (F) is dominant; smooth-skinned fruit (f) is recessive. All offsprings have fuzzy fruits. What are possible parents’ genotype and phenotype? A phenotypic ratio of 3:1 in the offspring of a mating of two organisms must stem from the marriage of what type of genotypic parents? _____________________________________________ When a plant with yellow seeds (dominant) is crossed with a green-seeded plant, some of the offspring is green-seeded What are the genotypes of the parents? What are the genotypes of the offspring? What is the phenotypic ratio of the offspring? 5 Trait fuzzy-skinned fruit (F) is dominant; smooth-skinned fruit (f) is recessive. All offsprings have fuzzy fruits. What are possible parents’ genotype and phenotype?
