Genetic Analysis: An Integrated Approach (3rd Edition)
3rd Edition
ISBN: 9780134605173
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Textbook Question
Chapter B, Problem 9P
If a man and a woman are each heterozygous carriers of a mutation causing a disease on the RUSP list, what do you think are the three or four most important factors they should consider in their decision making about having children?
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what is the probability that a couple (both heterozygous for the same recessive mutation) will have two children with the disease if the couple plans to have four children in total?
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Chapter B Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
Ch. B - Prob. 1PCh. B - Prob. 2PCh. B - B.3 Log on to the National Institute for Child...Ch. B - B.4 What communitybased genetic screening...Ch. B - B.5 Describe the gene and protein defects in...Ch. B - B.6 A couple and some of their relatives are...Ch. B - Prob. 7PCh. B - Do you think it is important that participation in...Ch. B - B.9 If a man and a woman are each heterozygous...Ch. B - B.10 Suppose a man and a woman are each...
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- YOUR SISTER DIED FROM TAY-SACHS DISEASE, INHERITED AS A RECESSIVE ALLELE (t). you're married and planning to start your family. you're worried about the disease and decide to have genetic testing to see if you or your spouse is a carrier of the tay-sachs allele. the test results show that you're a carrier of the allele, but your spouse isn't. what is the probability that you and your spouse will have a child with tay-sachs disease? show your work.arrow_forwardA young couple went to see a genetic counselor because each had a sibling with cystic fibrosis. (Cystic fibrosis is a recessive disease, and neither member of the couple nor any of their four parents is affected.) What is the probability that the female of this couple is a carrier? What are the chances that their child will have cystic fibrosis? 3. What is the probability that their child will be a carrier of the cystic fibrosis disease allele?arrow_forwardIf both parents carry one copy each of the mutation that causes Huntingtons , what are the odds that their child would have the disease ? A)25 B 75 C 50 D 100arrow_forward
- Albinism and sickle cell anemia are both autosomal recessive disorders that are expressed only in the homozygous state. Two parents who are carriers for both albinism and sickle cell anemia plan to have a child. What is the probability that the child will have exactly one of the conditions? 3/8 7/16 O 1/16 O 1/4 9/16arrow_forwardKelly and Sam are both unaffected carriers for two autosomal recessive disorders, PKU (chromosome 12) and cystic fibrosis (chromosome 7). They are expecting a daughter. What is the probability that she will be unaffected by PKU, but effected by cystic fibrosis? O 1/16 O 3/16 O 1/2 О 3/4 O 9/16arrow_forwardFor a recessive condition, two normal heterozygous individuals have children. What is the likelihood of their children being affected by this condition? What is the likelihood of their children being carriers without the condition? What is the likelihood of their asymptomatic children being carriers? Suppose that an individual with the condition has children with a heterozygous individual, what is the likelihood of their children being carriers?arrow_forward
- At her first prenatal visit, a woman relates that her maternal aunt has cystic fibrosis, an autosomal recessive illness. Which of the following statements is appropriate for the nurse to make? a. It is unnecessary for you to worry since our aunt is not a direct relation." b. "We can check to see whether or not you are a carrier for cystic fibrosis." c. "You should have an amniocentesis to see whether or not your child has the disease." d. Please ask your mother whether she has ever had any symptoms of cystic fibrosisarrow_forwardBob and Joan know from a blood test that they are each heterozygous (carriers) for the autosomal recessive gene that causes sickle cell disease. If their first three children are healthy, what is the probability that their fourth child will have the disease?arrow_forwardA man with X-linked color blindness marries a woman with no history of color blindness in her family. The daughter of this couple marries a normal man, and their daughter also marries a normal man. What is the chance that this last couple will have a child with color blindness? If this couple has already had a child with color blindness, what is the chance that their next child will be color blind?arrow_forward
- Greg is color blind and marries Susan, who is a carrier for color blindness. Color blindness is an X-linked, genetic trait. Draw the Punnett square for their children. Label each individual in the chart with their actual or predicted genotype. Fill input: Fill input: Fill input: Fill input: Fill input: Fill input: Fill input: Fill input: XX X Xy y xy X Xx Is there any chance they could have a son who is not color blind? If so, what is the probability of Greg and Susan having a son with normal vision? What is the probability of Greg and Susan having a color-blind daughter?arrow_forwardDuchenne muscular dystrophy is a sex-linked recessive disorder characterized by a progressive loss of muscle tissue. Neither Carla nor Rudy has Duchenne muscular dystrophy, but their first son does have it. What can you say about Rudy's or Carla's genotype in relation with the disorder? If the couple has a second child, what is the probability that he or she will also have the disease? Show your answers with a Punnet square.arrow_forwardIf a couple has six boys, what is the probability that a seventh child will be a girl?arrow_forward
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