EBK BIOLOGY
5th Edition
ISBN: 9780100667976
Author: Maier
Publisher: YUZU
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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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How might people who have a genetic risk of certain diseases but who show no symptoms exist in a space between the healthy and the sick?
The link between SCT and increased risk of death has been documented. Is that not enough to warrant testing, as long as a link exists? Couldn't one argue that it would instead be neglectful to NOT test for this trait since we do know that such a link exists?
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.
Chapter 7 Solutions
EBK BIOLOGY
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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- Do people look differently upon those afflicted with mental illness if we have a perspective grounded in an understanding that this is a genetic diagnosis? How so?arrow_forwardRecessive 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 reproductionarrow_forwardNancy 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…arrow_forward
- A 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_forwardThe 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 drug tamoxifen has been used to treat some types of breast cancer. Suppose even among female patients with the same tumor grade there is variation in responsiveness to tamoxifen. It is also found that this variation is at least partly genetic; his variation is at least partly genetic; women with a relative who had a low responsiveness to the drug are at higher risk of low responsiveness to the drug The target of tamoxifen is a protein called the estrogen receptor. A. Outline how a “candidate gene approach” could be conducted to investigate whether variation in the gene for estrogen receptor affects tamoxifen responsivenessarrow_forward
- Write a short explanatory essay on the following statement: “Incases of genetically programmed phenotypic plasticity, naturalselection acts on the norm of reaction. Thus the norm of reactionas a whole—rather than any one phenotype—determines ifselection is positive or negative.”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_forwardWhat is the "common disease, common variant hypothesis for the genetic basis of mental health disorders? How is this different than "rare variants"?arrow_forward
- Select all the characteristics that make sickle-cell disease a good candidate to study genetic diseases. (Check all that apply.) Check All That Apply It is easily identifiable by a physical characteristic.It is easily identifiable by a physical characteristic. It results from a single change in a single gene.It results from a single change in a single gene. It can be influenced by the environment.It can be influenced by the environment. The sickle-cell inheritance pattern is not influenced by other genes.The sickle-cell inheritance pattern is not influenced by other genes.arrow_forwardGive 5 examples of phenocopiesarrow_forwardUsing examples from the literature, explain how genome-wide association studies have helped us understand the origins of neurodevelopmental disorders such as autism, ADHD and/or schizophreniaarrow_forward
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