• Review the characteristics of a pedigree: Majority of a couple's children display a genetic condition. In the following generation, children of affected individuals inherit the disease Also in this generation, children of two unaffected individuals do not inherit the disease This disease is caused by what type of allele?
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Step 1: The given information suggests that the disease is caused by a recessive allele. Show more…
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Couple has two offspring; one child with an autosomal recessive disease trait and one normal. What conclusions can we make about the parents? One parent must have the autosomal recessive disease. Both parents must carry the autosomal recessive disease. One parent is a carrier for the autosomal recessive disease and the other parent is normal. Both parents probably carry the autosomal recessive disease. Which of the following is generally true of an X-linked recessive pedigree? Disease affects more males than females. Pattern of skipped generations. Males are usually affected. Mothers can transmit the disease to their daughters. Which of the following genetic diseases is transmitted through autosomal recessive inheritance? Duchenne muscular dystrophy. Cystic fibrosis. Hemophilia. Huntington's disease. Diabetes mellitus type 2 can be common within a family, and yet no single gene has been identified causing the problem, although diet and exercise habits influence whether the disease develops. This disease is probably controlled by: complex gene regulation. autosomal recessive mutation. multifactorial inheritance. A 41-year-old pregnant female miscarries her first fetus. Analysis shows that the fetus had 45 chromosomes. Which of the following describes this condition? Euploidy. Triploidy. Tetraploidy. Aneuploidy. Genetic testing reveals that a woman has inherited a 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? The disease has incomplete penetrance. The disease is caused by epigenetic modifications. She is a chromosomal mosaic. She has Turner Syndrome. A healthy couple has a child with hemophilia. The couple later divorces and each remarries. Which of the following statements is correct? If the father has more children with his new wife, there is a 50% chance that his daughters will have hemophilia. If the father has more children with his new wife, there is a 50% chance that his sons will have hemophilia. If the mother has more children with her new husband, there is a 50% chance that her sons will have hemophilia. If the mother has more children with her new husband, there is a 50% chance that her daughters will have hemophilia.
Adi S.
Autosomal dominant pedigrees Key: affected, affected, affected, one allele unknown, aa, unaffected Autosomal dominant disorders: Affected children will usually have an affected parent. Heterozygotes (Aa) are affected. Two affected parents can produce an unaffected child. Two unaffected parents will not have affected children. Both males and females are affected with equal frequency.
The following family pedigree shows individuals afflicted with a metabolic disease. What is the mode of inheritance shown in this pedigree? If the couple b and c were to have 2 boys and 2 girls, demonstrate your understanding of the mode of inheritance by predicting their phenotypes. Draw your answer directly on the pedigree; the symbols used must reflect the correct sex and phenotypes of the offspring. (2 points).
Madhur L.
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