4. Huntington's disease affects the muscles and nervous system. People who have Huntington's'usually get the disease in their 30s. Which of the following is the most accurate statement? A. Huntington's disease could not be due to genetics because genes determine your inherited traits from birth and they do not change in your 30s. B. Huntington's disease could not be due to genetics because everyone's internal organs are the same. C. Huntington's disease could be due to genetics because a slight change in a gene you are born with produces an abnormal protein that eventually leads to a disease. D. Huntington's disease could be due to genetics because most diseases that affect the nervous system are due to genetics.

4. Huntington's disease affects the muscles and nervous system. People who have Huntington's'usually get the disease in their 30s. Which of the following is the most accurate statement? A. Huntington's disease could not be due to genetics because genes determine your inherited traits from birth and they do not change in your 30s. B. Huntington's disease could not be due to genetics because everyone's internal organs are the same. C. Huntington's disease could be due to genetics because a slight change in a gene you are born with produces an abnormal protein that eventually leads to a disease. D. Huntington's disease could be due to genetics because most diseases that affect the nervous system are due to genetics.

Understanding Nutrition (MindTap Course List)

15th Edition

ISBN:9781337392693

Author:Eleanor Noss Whitney, Sharon Rady Rolfes

Publisher:Eleanor Noss Whitney, Sharon Rady Rolfes

Chapter6: Protein: Amino Acids

Section: Chapter Questions

Problem 1BCTQ: You may have heard about the diet that is based on a persons blood type and claims to restore the...

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1. What is the phenotype of the genetic disorder? 2. How does it express itself? 3. Does it cause you to be tall? 4. Your liver to function irregularly? 5. Do you feel no pain? 6. Are you born with extra teeth? 7. Does your body odor smell like maple syrup (maple syrup urine disorder)? 8.What does it do to you?
1. The first genetic test used a short DNA sequence that was closely linked to the Huntington’s locus. People taking the test were classified as to whether they had the DNA sequence that was linked to the Huntington’s disease. This method was 95% accurate. This means that 95% of the people who had the Huntington’s-linked DNA sequence actually inherited the Huntington allele. It also meant that 95% of the people who did not have the DNA sequence linked to the Huntington allele did not inherited the wild-type allele (not the Huntington allele).Why might this preliminary test not be as accurate as a gene test for the actual Huntington’s allele? Explain.
Bob says that he is healthy and has no genetic diseases such as hemophilia or Down syndrome. Therefore, he says, genetics plays little role in his life. Do you think Bob is correct in his conclusion? Why or why not?
Explain why you agree or disagree with each of thefollowing statements:a. We should not worry much about exposure totoxic chemicals because almost any chemical, at alarge enough dosage, can cause some harm.b. We should not worry much about exposureto toxic chemicals because, through geneticadaptation, we can develop immunities to suchchemicals.c. We should not worry much about exposureto toxic chemicals because we can use geneticengineering to reduce our susceptibility to theireffects.d. We should not worry about exposure to a chemical such as bisphenol A (BPA) because it has notbeen absolutely proven scientifically that BPA haskilled anyone.
You may have heard about the diet that is based on a persons blood type and claims to restore the bodys natural genetic rhythms and improve health. Research may one day reveal exactly which foods might best turn on and off specific genes to defend against specific chronic diseases. No doubt marketers will rush to fill grocery shelves with foods manufactured to match genetic profiles. Why do you think these genetic approaches to diet and health might be more or less appealing than eating patterns that include a variety of fruits, vegetables, whole grains, milk products, and meats?
. Autism is a neurological disorder thought to becaused by mutant alleles of one or more genes.Scientists had been wondering why the number ofchildren diagnosed as autistic increased dramaticallyin a decade, from 1 in 500 in 2002 to 1 in 88 in 2012.Researchers now think that they might have found atleast part of the answer: Men are fathering children atlater and later ages. A paper published in the journalNature in 2012 showed a correlation between paternalage and the incidence of autism; the age of the motherwas not a factor. How does this observation provide apossible explanation for the apparent increase in therate of autism?
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…
If you knew that a devastating late-onset inherited disease runsin your family (in other words, a disease that does not appearuntil later in life) and you could be tested for it at the age of 20,would you want to know whether you are a carrier? Would youranswer be likely to change when you reach age 40?
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?
“The one common denominator for all of the young children [with autism] is that early intervention does work, and it seems to improve the prognosis”. Who said this?
2. Anyone who inherits a single copy of the Huntington’s allele will get Huntington’s disease, if they live long enough. The age of onset of Huntington’s symptoms for those who inherit the disease allele can vary, starting in the patients’ 40s, 50s, or 60s. What is the genetic term for this variation in symptoms and in their time of appearance?
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?