When a disease is due to polygenic inheritance, the following is probably true: A. Many factors, both genetic and environmental, contribute to the disease traits. B. It is caused by one gene with a large number of alleles. C. It affects a large number of people. D. It has many different symptoms

Name: When a disease is due to polygenic inheritance, the following is proba
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Description: When a disease is due to polygenic inheritance, the following is probably true: A. Many factors, both genetic and environmental, contribute to the disease traits. B. It is caused by one gene with a large number of alleles. C. It affects a large numb

Answer: Polygenic disease: A genetic disorder that is caused by the combined action of more than one…

Answered: disease is due to polygenic inheritance

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Biology

disease is due to polygenic inheritance

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter4: Pedigree Analysis In Human Genetics

Section: Chapter Questions

Problem 3CS: Pedigree analysis is a fundamental tool for investigating whether or not a trait is following a...

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Which of the following statements describes the multifactual inheritance in genetics? A. One locus is associated with different traits. B. One locus is associated with variable phenotypes of a trait. C. Several loci are associated with the trait.
Based on the observed inheritance pattern and ratio of phenotypes, what are the genotypes of the affected children? a) If c- = Cystic Fibrosis, the children are c-/c-. b) If c- = Cystic Fibrosis, the children are C/C. c) If c- = Cystic Fibrosis, the children are C/c-. d) If c- = Cystic Fibrosis, the children are C.
In a trait that follows Mendelian rules of inheritance, what is the only way an organism can have the recessive phenotype? A. By having the homozygous recessive genotype B. By being heterozygous for that genotype C. It is not possible to get the recessive phenotype in Mendelian genetics D. If one parent is homozygous recessive for that trait, any offspring are guaranteed the recessive phenotype E. By being homozygous dominant for that genotype
When sets of genes group together, the result can be multiple traits expressed as a single dominant trait. This is best explained by the process known as a. dominant inheritance. b. recessive inheritance. c. polygenic inheritance. d. amines.
If you have a recessive phenotype for a given trait, but neither of your parents has that phenotype, what can you say about the genotype of your parents for that trait? A) Both of your parents must be homozygous dominant B) Both of your parents have to be hetorozygous C) One of your parents might be homozygous dominant but the other has to be hetorozygous D) Both of your parents have to be homozygous recessive
Which of the following cannot be true about the inheritance the trait depicted in the pedigree diagram below? A. It is recessive B. It is dominant C. It is on the X chromosome D. There is not enough information to determine the mechanism of inheritance
A particular person is said to be a carrier of a genetic trait. What does this tell you about their phenotype? (a) They physically show the trait. (b) They physically show the trait more than a noncarrier would show the trait.(c) They are almost normal but show an intermediate phenotype for the trait. (d) They are completely normal and do not physically show the trait.
One form of the bleeding disorder known as von Willebrand disease is an autosomal recessive disease. A man who is a carrier marries a woman who is also a carrier of the disease. (a) What percentage of their children are likely to have a disease phenotype? (b) What percentage of their children are likely to have a normal phenotype? (c) What percentage of their children are likely to be carriers of the disease?
Which of the following must be true about the inheritance the trait depicted in the pedigree diagram below. A. it is recessive B. It is dominant C. It is on the X chromosome D. There is not enough information to determine the mechanism of inheritance
Which of the following is not true of the sickle-cell allele? a)it became an important genetic factor after slash-and-burn agriculture was introduced b)it became an important genetic factor after fields were cleared that put humans near mosquitos c)it became an important genetic factor approximately 2000 years ago d)it provides a reproductive advantage to heterozygotes e)only homozygous normals will survive thanks to this trait
If the allele for brown hair is represented as “B” , it would mean that. A- the gene for brown hair is carried on the maternal chromosome B- brown hair is a dominant trait/ gene C- brown hair is a recessive trait/gene D- the gene for brown hair is carried on the paternal chromosome
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. 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 decide to have a child if the test results said that you carry the mutation for breast and ovarian cancer? The heart disease mutation? The TSD mutation? The heart disease and the mutant alleles?