Autosomal recessive disease trait

A couple has two offspring; one child has an autosomal recessive disease trait and one is normal. What conclusions can you make about the parents? A. One parent must have autosomal recessive disease. B. Both parents must have autosomal recessive disease. 24. C. One parent is a carrier for the autosomal recessive gene and the other parent is normal. D. Both parents are probably carriers which of the following is generally true of an X-linked recessive pedigree? A. Disease is seen more often in males than females. B. A pattern of skipped generations is rare. C. Males are gene carriers. D. Mothers usually transmit the disease to their daughters. 25, 26. Which of the following genetic diseases is transmitted through autosomal recessive inheritance? A. Duchenne muscular dystrophy B. Cystic fibrosis C. Hemophilia D. Huntington’s disease 27. Diabetes mellitus type 2 can be common within a family, and yet no single gene has been identified as causing the problem, although diet and exercise habits influence whether the disease develops. This disease is probably controlled by: A. an autosomal recessive mutation. B. a sex-linked mutation. C. an autosomal recessive mutation. D. multifactorial inheritance. 28. A 41-year-old pregnant female miscarries in her first trimester. A karyotype shows that the fetus had 45 chromosomes. Which of the following describes this condition? A. Euploidy B. Triploidy C. Tetraploidy D. Aneuploidy Genetic testing reveals that a woman has inherited an autosomal dominant disease gene from her mother, and yet she does not exhibit any symptoms of the disease. Which of the following could best explain this? A. The disease gene has partial penetrance. B. The disease is caused by epigenetic modifications. C. She is a chromosomal mosaic. D. She has Turner syndrome. 29. 30. A healthy couple has a son with hemophilia. The couple later divorces and each remarries. Which of the following statements is CORRECT? A. If the father has more children with his new wife, there is a 50% chance that his daughters B. If the father has more children with his new wife, there is a 50% chance that his sons will C. Ifthe mother has more children with her new husband, there is a S0% chance that her sons D. If the mother has more children with her new husband, there is a 5096 chance that her will have hemophilia. have hemophilia. will have hemophilia. daughters will have hemophilia.

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