Genetics: From Genes to Genomes, 5th edition
5th Edition
ISBN: 9780073525310
Author: Leland H. Hartwell, Michael L. Goldberg, Janice A. Fischer, Leroy Hood, Charles F. Aquadro
Publisher: McGraw-Hill Education
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Chapter 2, Problem 26P
A pea plant heterozygous for plant height, pod shape, and flower color was selfed. The progeny consisted of 272 tall, inflated pods, purple flowers; 92 tall, inflated, white flowers; 88 tall, flat pods, purple; 93 dwarf, inflated, purple; 35 tall, flat, white; 31 dwarf, inflated, white; 29 dwarf, flat, purple; 11 dwarf, flat, white. Which alleles are dominant in this cross?
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A pea heterozygous for plant height,
pod shape and flower color was selfed.
The progeny consisted of 272 tall,
inflated pods, purple flowers;
92 tall, inflated, white flowers; 88 tall,
flat pods, purple flowers; 93 dwarf,
inflated, purple flowers; 35 tall, flat,
white flowers; 31 dwarf inflated, white
flowers; 29 dwarf, flat, purple flowers;
11 dwarf, flat, white flowers. Which
alleles are dominant in this cross?
A pea plant heterozygous for plant height, podshape, and flower color was selfed. The progenyconsisted of 272 tall, inflated pods, purple flowers;92 tall, inflated, white flowers; 88 tall, flat pods,purple; 93 dwarf, inflated, purple; 35 tall, flat, white;31 dwarf, inflated, white; 29 dwarf, flat, purple;11 dwarf, flat, white. Which alleles are dominantin this cross?
A pea plant is heterozygous for both pod shape and color. I is the allele for dominant, inflated pod; i is the allele for recessive, constricted pod. G is the allele for dominant, green pod; g is the allele for recessive, yellow color characteristic. Suppose this plant is crossed with a homozygous pea with inflated, green pod, what will be the possible genotype of the offspring?
Construct the punnet square, then identify the following:
1. Parents’ genes?2. Parents’ traits?3. Genes (genotype)?4. Shape, color? (phenotype)?5. Genotypic ratio?6. Phenotypic ratio?
Chapter 2 Solutions
Genetics: From Genes to Genomes, 5th edition
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Ch. 2 - Among Native Americans, two types of earwax...Ch. 2 - Imagine you have just purchased a black stallion...Ch. 2 - If you roll a die singular of dice, what is the...Ch. 2 - Prob. 14PCh. 2 - How many genetically different eggs could be...Ch. 2 - What is the probability of producing a child that...Ch. 2 - Prob. 17PCh. 2 - Galactosemia is a recessive human disease that is...Ch. 2 - Albinism is a condition in which pigmentation is...Ch. 2 - A cross between two pea plants, both of which grew...Ch. 2 - A third-grader decided to breed guinea pigs for...Ch. 2 - The self-fertilization of an pea plant produced...Ch. 2 - Prob. 23PCh. 2 - A pea plant from a pure-breeding strain that is...Ch. 2 - Prob. 25PCh. 2 - A pea plant heterozygous for plant height, pod...Ch. 2 - In the fruit fly Drosophila melanogaster, the...Ch. 2 - Prob. 28PCh. 2 - Considering the yellow and green pea color...Ch. 2 - Prob. 30PCh. 2 - Prob. 31PCh. 2 - Prob. 32PCh. 2 - For each of the following human pedigrees,...Ch. 2 - Consider the pedigree that follows for cutis laxa,...Ch. 2 - A young couple went to see a genetic counselor...Ch. 2 - Huntington disease is a rare fatal, degenerative...Ch. 2 - Is the disease shown in the following pedigree...Ch. 2 - Figure 2.22 shows the inheritance of Huntington...Ch. 2 - Prob. 39PCh. 2 - People with nail-patella syndrome have poorly...Ch. 2 - Midphalangeal hair hair on top of the middle...Ch. 2 - A man with Huntington disease he is heterozygous...Ch. 2 - Explain why disease alleles for cystic fibrosis CF...
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- A pea plant is heterozygous for both pod shape and color. I is the allele for dominant, inflated pod; i is the allele for recessive, constricted pod. G is the allele for dominant, green pod; g is the allele for recessive, yellow color characteristic. Suppose this plant is crossed with a homozygous pea with inflated, green pod, what will be the possible genotype of the offspring? Identify the: Parents’ genes?Parents’ traits?Genes (genotype)?Shape, color? (phenotype)?Genotypic ratio?Phenotypic ratio?arrow_forwardA Pea plant with axial flower position, tall stem length, and green seed pod color is cross with another pea plant that has axial flower position, dwarf stem length, and yellow seed pod color. Assume heterozygosity for all dominant trait. How many genotype will be formed from the cross?arrow_forwardA white flowered plant is crossed with a plant that is heterozygous for the trait. What percentage of the offspring will have purple flowers? What is the phenotypic ratio? What is the genotypic ratio? What % will be purple? 50% What % will be white?arrow_forward
- In a particular plant, green seed color is dominant to yellow seed color. If all of the offspring of a cross were heterozygous green , what were the genotypes of the parents?arrow_forwardIn crosses made among four-o'clock plants, red flower color plants are crossed with white flower color plants. All the offspring show a pink flower color. If a pink-flowered plant is crossed with another pink-flowered plant, what will be the phenotypic ratios of their offspring? All pink flowered 3/4 pink flowered, 1/4 red flowered 1/2 red flowered, 1/2 pink flowered 1/2 white flowered, 1/2 pink flowered 1/4 red flowered, 1/4 white flowered, 1/2 pink floweredarrow_forwardIf a homozygous tall pea plant is crossed with a homozygous shortpea plant, what are the possible genotype and phenotype of theoffspring? Legend: T- tall pea plant t- short pea plant Genotypes of the parents: TT x tt Question to answer ff: 1. What is the genotypic ratio? 2. What are the possible phenotypes of the offspring? 3. What is the phenotypic ratio?arrow_forward
- Purple (P) flower color is dominant to white (p) flower color. Cross two heterozygous parents using a Punnett square. What are the genotypes and phenotypes of the resulting offspring? Express the results as ratios.arrow_forwardConsidering the Mendelian traits tall (D) versus dwarf (d) and violet (W) versus white (w), consider the crosses below and determine the genotypes of the parental plants by analyzing the phenotypes of the offspring. Parental Plants Offspring tall, violet x tall, white 3/8 tall, white 3/8 tall, violet 1/8 dwarf, violet 1/8 dwarf, white Select the one best answer. DDWW x DDww DdWw x Ddww DDWW x Ddww DDWw x DdWw DdWw x ddWwarrow_forwardIn crosses made among four-o'clock plants, red flower color plants are crossed with white flower color plants. All the offspring show a pink flower color. If a pink-flowered plant is crossed with a red-flowered plant, what will be the phenotypic ratios of their offspring? 1/4 red flowered, 1/4 white flowered, 1/2 pink flowered 1/3 red flowered, 2/3 pink flowered 1/2 red flowered, 1/2 pink flowered 3/4 red flowered, 1/4 pink flowered 1/2 white flowered, 1/2 pink floweredarrow_forward
- In a unique species of plants, flowers may be yellow, blue, red, or mauve. All colors may be true breeding. If plants with blue flowers are crossed to red-flowered plants, all F1 plants have yellow flowers. When these produced an F2 generation, the following ratio was observed: 9/16 yellow: 3/16 blue: 3/16 red: 1/16 mauve In still another cross using true-breeding parents, yellow-flowered plants are crossed with mauve-flowered plants. Again, all F1 plants had yellow flowers and the F2 showed a 9:3:3:1 ratio, as just shown. (a) Describe the inheritance of flower color by defining gene symbols and designating which genotypes give rise to each of the four phenotypes. (b) Determine the F1 and F2 results of a cross between truebreeding red and true-breeding mauve-flowered plants.arrow_forwardThe allele for dimples (D) is dominant to the allele for no dimples (d). A man heterozygous for dimples marries a woman who is also heterozygous for dimples. What is the man’s genotype and the woman’s genotype? What is the man’s phenotype and the woman’s phenotype? Do a cross to determine all potential dimple genotypes and phenotypes for the offspring of this man and woman.arrow_forwardA cross is made between a pea plant that has constricted pods (a recessive trait; smooth is dominant) and is heterozygous for seed color (yellow is dominant to green) and a plant that is heterozygous for both pod texture and seed color. Construct a Punnett square that depicts this cross. What are the predicted outcomes of genotypes and phenotypes of the offspring?arrow_forward
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