Essentials of Biology (5th International Edition)
5th Edition
ISBN: 9781259660269
Author: Sylvia S. Mader, Dr., Michael Windelspecht
Publisher: Mcgraw-Hill
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Chapter 10.3, Problem 1LO
Understand how incomplete dominance and codominance deviate from traditional Mendelian expectations.
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Students have asked these similar questions
Gregor Mendel discovered the basis of heredity with his sweet pea plant experiments. In his studies, he determined that certain traits, such as pod color and pea shape, express complete dominance.
Trait
Dominant
Recessive
Pod color
Yellow
Green
Pea shape
Round
Wrinkled
A cross occurs between a plant with heterozygous yellow pods and wrinkled peas and a plant with green pods and heterozygous round peas. What is the probability that the offspring will exhibit recessive genes for both traits?
a) 1/2
b) 1/4
c) 1/8
d) 1/16
Which of the following statements are true regarding Mendel's observations of single factor crosses?
All F2 offspring exhibit the dominant phenotype
3/4 of F1 offspring exhibit the dominant phenotype
3/4 of F2 offspring exhibit the dominant phenotype
The segregation of alleles into the gametes of F1 offspring determines the ratio of phenotypes observed in the F2.
The independent assortment of alleles into the gametes of F1 offspring determines the ratio of phenotypes observed in the F2.
All F1 offspring exhibit the dominant phenotype
Consider the following cross examining four gene in two parental line:
Parent 1: A/a; B/B; D/d; E/e
Parent 2: A/a; B/b; d/d; e/e
Assuming independent assortment for the four genes, what fraction of progeny will be phenotypically identical to either parent 1 or parent 2? (Hint: first figure out the fraction of progeny that resembles parent 1 and parent 2 separately, then get the overall fraction.)
3/8
3/4
3/16
1/16
9/16
Chapter 10 Solutions
Essentials of Biology (5th International Edition)
Ch. 10.1 - Prob. 1LOCh. 10.1 - Prob. 2LOCh. 10.1 - Distinguish between dominant and recessive traits.Ch. 10.1 - Apply Mendel`s laws to solve and interpret...Ch. 10.1 - Recognize and explain the relationship between...Ch. 10.1 - Summarize what Mendel`s experiments explained...Ch. 10.1 - Compare the phenotypic and genotypic ratios of a...Ch. 10.1 - Solve the following (using Figure 10.6): What is...Ch. 10.1 - Prob. 4CYPCh. 10.1 - Prob. 1A
Ch. 10.1 - Prob. 2ACh. 10.1 - Prob. 3ACh. 10.1 - Prob. 4ACh. 10.2 - Prob. 1LOCh. 10.2 - Prob. 2LOCh. 10.2 - List some common genetic disorders, state the...Ch. 10.2 - Prob. 1CYPCh. 10.2 - Prob. 2CYPCh. 10.2 - Prob. 3CYPCh. 10.2 - Prob. 5ACh. 10.2 - Prob. 6ACh. 10.2 - Prob. 7ACh. 10.2 - Prob. 8ACh. 10.2 - Prob. 9ACh. 10.2 - Prob. 10ACh. 10.2 - Prob. 11ACh. 10.3 - Understand how incomplete dominance and...Ch. 10.3 - Prob. 2LOCh. 10.3 - Prob. 3LOCh. 10.3 - Prob. 4LOCh. 10.3 - Prob. 1CYPCh. 10.3 - Prob. 2CYPCh. 10.3 - Prob. 3CYPCh. 10.3 - Explain how gene linkage and gene interactions...Ch. 10.3 - Prob. 12ACh. 10.3 - Prob. 13ACh. 10.3 - Prob. 14ACh. 10.4 - Prob. 1LOCh. 10.4 - Prob. 2LOCh. 10.4 - Prob. 3LOCh. 10.4 - Prob. 1CYPCh. 10.4 - Prob. 2CYPCh. 10.4 - Prob. 3CYPCh. 10.4 - Prob. 15ACh. 10 - 1. How does the collection of chromosomes we...Ch. 10 - Prob. 2BYBCh. 10 - How does meiosis help predict the probability of...Ch. 10 - Prob. S3.2BYBCh. 10 - Prob. S8.2BYBCh. 10 - Prob. S9.2BYBCh. 10 - Prob. 1TCCh. 10 - Prob. 2TCCh. 10 - Technology that can separate X-bearing and...
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- Pedigree analysis is a fundamental tool for investigating whether or not a trait is following a Mendelian pattern of inheritance. It can also be used to help identify individuals within a family who may be at risk for the trait. Adam and Sarah, a young couple of Eastern European Jewish ancestry, went to a genetic counselor because they were planning a family and wanted to know what their chances were for having a child with a genetic condition. The genetic counselor took a detailed family history from both of them and discovered several traits in their respective families. Sarahs maternal family history is suggestive of an autosomal dominant pattern of cancer predisposition to breast and ovarian cancer because of the young ages at which her mother and grandmother were diagnosed with their cancers. 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Because TSD is a recessively inherited disorder, both of his cousins parents must have been heterozygous carriers of the mutant allele. If that is the case, Adams father could be a carrier as well. If Adams father carries the mutant TSD allele, it is possible that Adam inherited this mutation. Because Sarah is also of Eastern European Jewish ancestry, she could also be a carrier of the gene, even though no one in her family has been affected with TSD. If Adam and Sarah are both carriers, each of their children would have a 25% chance of being afflicted with TSD. A simple blood test performed on both Sarah and Adam could determine whether they are carriers of this mutation. If Sarah carries the mutant cancer allele and Adam carries the mutant heart disease allele, what is the chance that they would have a child who is free of both diseases? Are these good odds?arrow_forwardPedigree analysis is a fundamental tool for investigating whether or not a trait is following a Mendelian pattern of inheritance. It can also be used to help identify individuals within a family who may be at risk for the trait. Adam and Sarah, a young couple of Eastern European Jewish ancestry, went to a genetic counselor because they were planning a family and wanted to know what their chances were for having a child with a genetic condition. The genetic counselor took a detailed family history from both of them and discovered several traits in their respective families. Sarahs maternal family history is suggestive of an autosomal dominant pattern of cancer predisposition to breast and ovarian cancer because of the young ages at which her mother and grandmother were diagnosed with their cancers. If a mutant allele that predisposed to breast and ovarian cancer was inherited in Sarahs family, she, her sister, and any of her own future children could be at risk for inheriting this mutation. The counselor told her that genetic testing is available that may help determine if this mutant allele is present in her family members. Adams paternal family history has a very strong pattern of early onset heart disease. An autosomal dominant condition known as familial hypercholesterolemia may be responsible for the large number of deaths from heart disease. As with hereditary breast and ovarian cancer, genetic testing is available to see if Adam carries the mutant allele. Testing will give the couple more information about the chances that their children could inherit this mutation. Adam had a first cousin who died from Tay-Sachs disease (TSD), a fatal autosomal recessive condition most commonly found in people of Eastern European Jewish descent. Because TSD is a recessively inherited disorder, both of his cousins parents must have been heterozygous carriers of the mutant allele. If that is the case, Adams father could be a carrier as well. If Adams father carries the mutant TSD allele, it is possible that Adam inherited this mutation. Because Sarah is also of Eastern European Jewish ancestry, she could also be a carrier of the gene, even though no one in her family has been affected with TSD. If Adam and Sarah are both carriers, each of their children would have a 25% chance of being afflicted with TSD. A simple blood test performed on both Sarah and Adam could determine whether they are carriers of this mutation. Would you want to know the results of the cancer, heart disease, and TSD tests if you were Sarah and Adam? Is it their responsibility as potential parents to gather this type of information before they decide to have a child?arrow_forwardPedigree analysis is a fundamental tool for investigating whether or not a trait is following a Mendelian pattern of inheritance. It can also be used to help identify individuals within a family who may be at risk for the trait. Adam and Sarah, a young couple of Eastern European Jewish ancestry, went to a genetic counselor because they were planning a family and wanted to know what their chances were for having a child with a genetic condition. The genetic counselor took a detailed family history from both of them and discovered several traits in their respective families. Sarahs maternal family history is suggestive of an autosomal dominant pattern of cancer predisposition to breast and ovarian cancer because of the young ages at which her mother and grandmother were diagnosed with their cancers. If a mutant allele that predisposed to breast and ovarian cancer was inherited in Sarahs family, she, her sister, and any of her own future children could be at risk for inheriting this mutation. The counselor told her that genetic testing is available that may help determine if this mutant allele is present in her family members. Adams paternal family history has a very strong pattern of early onset heart disease. An autosomal dominant condition known as familial hypercholesterolemia may be responsible for the large number of deaths from heart disease. As with hereditary breast and ovarian cancer, genetic testing is available to see if Adam carries the mutant allele. Testing will give the couple more information about the chances that their children could inherit this mutation. Adam had a first cousin who died from Tay-Sachs disease (TSD), a fatal autosomal recessive condition most commonly found in people of Eastern European Jewish descent. 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