Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 7, Problem 1CTS
Summary Introduction
To write:
If the scientists find out the trait responsible for undesirable characters, it can lead to treatment of the people affected by the disorders and measures taken to prevent the individuals born with this trait.
Introduction:
The genes are responsible for the different types of characters in humans. Some of the conditions are completely determined by the genes and some of the traits are affected by both genes and the environment.
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What is biological determinism? (Hint: are you destined to have the phenotype typically associated with your genotype? Do your genes determine your destiny?) Explain the misconception of biological determinism.
Nancy Jones is a doctor who specializes in genetic diseases. For many years she has been studying populations of people who have Huntington’s disease. Dr. Jones has a special interest in Huntington’s disease because her mother died of this disease after many years living in a wheelchair. Dr. Jones’s father does not appear to have the disease. She has developed a test that can detect the dominant Huntington’s gene before symptoms appear and she has performed this test on many people. This test involves mapping a person’s genome to determine if the dominant Huntington’s gene is present. Dr. Jones is unsure if she should take the test herself as it will not prevent the disease from developing, only give the person advanced warning of the disease. Nancy Jones has a sister.
Draw a pedigree chart that maps the disease through this family. Make sure to indicate those family members that have the disease, those that do not have the disease and those whose status is unknown. If you were Nancy…
Recessive genetic disorders are more frequent than disorders inherited as dominant because :
a) recessive genetic disorders are limited to persons of the same ethnicity
c) dominant genetic disorders are never expressed in males
d) people carrying dominant genetic disorders always die before birth
e ) carriers are not eliminated by the disease before reproduction
Chapter 7 Solutions
Biology: Science for Life with Physiology (5th Edition)
Ch. 7 - What is the relationship between genotype and...Ch. 7 - Prob. 2LTBCh. 7 - Prob. 3LTBCh. 7 - Prob. 4LTBCh. 7 - Prob. 5LTBCh. 7 - Scientists have recently developed a process by...Ch. 7 - What is the physical basis for the independent...Ch. 7 - Prob. 8LTBCh. 7 - Prob. 9LTBCh. 7 - Prob. 10LTB
Ch. 7 - Prob. 1GPCh. 7 - Prob. 2GPCh. 7 - Prob. 3GPCh. 7 - Prob. 4GPCh. 7 - Pfeiffer syndrome is a dominant genetic disease...Ch. 7 - Prob. 6GPCh. 7 - A cross between a pea plant that produces round...Ch. 7 - Prob. 8GPCh. 7 - The allele BRCA2 was identified in families with...Ch. 7 - Two parents both have brown eyes, but they have...Ch. 7 - Prob. 2AAATBCh. 7 - Prob. 3AAATBCh. 7 - Prob. 1CTSCh. 7 - Prob. 2CTSCh. 7 - Prob. 3CTS
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The father of three sons and two daughters begins to show symptoms of Huntington disease. What is the probability that Sam, the man’s second oldest son (II-2), will suffer from the disease if he lives a normal life span? Sam’s mother and her ancestors do not have the disease. Sam's father was adopted, so we do not know his biological family history for Huntington disease. Explore all possible outcomes for Sam and explain your reasoning. What about the risk to Sam's sisters? Would that be the same or not?arrow_forwardA woman who is eight (8) weeks pregnant requests a direct test for Huntington’s disease on her fetus. She tells her geneticist that she wants the test because she recently discovered that there is a family history of the disease in her husband’s family. One of his parents is affected so he is at 50% risk of developing the condition. She is adamant that she does not want to give birth to a baby who is at risk of developing Huntington’s and says that the test will help her to ensure that this is not the case. In counseling, she reveals that she has discussed this issue several times with her husband but he has always said he is not willing to take a test. He does not want to know his status and is extremely anxious about the possibility that he might develop the condition. The woman and her husband are currently separated but are seeing a relationship counselor and trying to work things out. Despite this, the woman says they tend to fight a lot. When it is explained to her in counseling…arrow_forwardRecessive genetic disorders are more frequent than disorders inherited as dominant because : a) carriers are not eliminated by the disease before reproduction b ) people carrying dominant genetic disorders always die before birth c ) dominant genetic disorders are never expressed in males e ) recessive genetic disorders are limited to persons of the same ethnicityarrow_forward
- The father of three sons and two daughters begins to show symptoms of Huntington's disease. What is the probability that Sam, the man’s second oldest son (II-2), will suffer from the disease if he lives a normal life span? Sam’s mother and her ancestors do not have the disease. Sam's father was adopted, so we do not know his biological family history for Huntington disease. Explore all possible outcomes for Sam and explain your reasoning. What about the risk to Sam's sisters? Would that be the same or not?arrow_forwardThe father of five children begins to show symptoms of huntington disease. what is the probability that same, the man's second oldest son (11-2),, will suffer from the disease if he lives a normal life span? Sam's mother and her ancestors do not have the diseas. Sam's father was adopted, so we do not know his biological family history for hunutington disease. Explore all possible outcome for sam and explain your reasoningarrow_forwardThe presence of certain factors in a person’s genetic makeup that increase the likelihood of eventually developing one or more diseases is known as aa )genetic mutation.b )genetic polymorphism.c )genetic predisposition.d )genotypearrow_forward
- Imagine that genetic technology advances to the point where the genetic profile of an individual can be easily obtained, and that we have a full understanding of how genes interact to influence our health. Based on this genetic information alone, how reliably do you think we would be able to predict a person's chance of getting a specific disease? Where do you think this type of genetic profiling would lead with respect to selection of offspring or genetic superiority?arrow_forward2) On the soap opera “The Young and the Restless”, several individuals suffer from a rapid aging syndrome in which a young child is sent off to boarding school and returns three months later an angry teenager. Victims have been known to age up to two decades in variations of the disorder. In the Newman family, siblings Nicholas and Victoria aged from ages six and eight to sixteen and eighteen within a few months. Their parents, Victor and Nikki, are not affected; in fact, they never seem to age at all. A. What is the mode of inheritance of the rapid aging disorder affecting Nicholas and Victoria? B. Explain your reasoning:arrow_forwardWhich of the following is an example of how genotype and environmental factors can work together to determine phenotype? O a) Temperature-senitive mutations O b) Nutritional factors resulting in epigenetic modification of genes c) Sex-influenced inheritance O d) Both A and B O e) Both A and Carrow_forward
- Epigenetics addresses a) the mechanism by which the environment alters a person’s genotype. b) the mechanism by which gene can code for more than one protein. c) the mechanisms that can alter gene expression. d) heritability patterns based on dominant and recessive alleles.arrow_forwardSuppose we define the Alzheimer's disease phenotype as being diagnosed with the disease by age 75 years. In the human population, there are three alleles of the ApoE gene: e2, e3, e4. They form an allelic series such that: 70% of 75 year olds with the e4/e4 genotype have the Alzheimer's phenotype 60% of 75 year olds with the e3/e4 genotype have the Alzheimer's phenotype 40% of 75 year olds with the e3/e3 genotype have the Alzheimer's phenotype 30% of 75 year olds with the e2/e4 genotype have the Alzheimer's phenotype 10% of 75 year olds with the e2/e3 genotype have the Alzheimer's phenotype If I have the e4/e4 genotype and my wife has the e2/e3 genotype, what is the probability that our child will have Alzheimer's by age 75. Explain your reasoning.arrow_forwardIn Huntington’s disease, the wild-type allele, h, is recessive to the disease allele, H. The persistence of an autosomal dominant allele that is fatal in 100% of cases is best explained by which of the following? A) The dominant allele only has moderate negative effects during adolescence and young adulthood. B) The wild-type h allele continues to spontaneously mutate into the dominant H allele. C) The persistence of any given allele in nature is determined almost wholly by chance. D) The disease has no effects until the individual has reached an age far past the normal age for reproduction.arrow_forward
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