Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 1.3, Problem 2EG
Why do unrelated children with a disorder such as Down syndrome resemble each other more closely than they do their siblings?
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Why do unrelated children with a disorder such as Down syndrome resemble each other more closely than they do their siblings?
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Chapter 1 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 1.3 - Ancient societies used knowledge that traits are...Ch. 1.3 - Why do unrelated children with a disorder such as...Ch. 1 - Mary and Marcie. identical twins, go to the same...Ch. 1 - Summarize Mendels conclusions about traits and how...Ch. 1 - What is population genetics?Ch. 1 - What is hereditarianism, and what is the invalid...Ch. 1 - What impact has recombinant DNA technology had on...Ch. 1 - Prob. 5QPCh. 1 - Prob. 6QPCh. 1 - In what way has biotechnology had an impact on...
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- Plssssssss helppppp, What are the symptoms of Down syndrome and what is the long term prognosis is for the person who has this disorder?arrow_forwardwhat 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?arrow_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
- What are affects when Nondisjunction occurs?arrow_forwardWhat are recessive conditions? What are dominant conditions? Why are recessive conditions more common than dominant ones?arrow_forwardMary and Ron don't have albinism. However, is it possible for them to have a child with albinism? Explain. Stephanie has normal color vision. Her husband Chris also has normal color vision. They have a son that is color blind and a daughter that has normal color vision. What is the genotype of the mother, father, son and the daughter? Andy and Anne do not have polydactyl. Is it possible for them to have a child with polydactyl? Explain. When examining a pedigree chart, I notice that only males are affected. What does this tell me about the inheritance pattern? A man with blood type A marries a woman with blood type B. Their child has blood type O. What are the genotypes of the parents?arrow_forward
- The 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_forwardHow is prenatal diagnosis of Down syndrome achieved?arrow_forwardWhat are the inheritable patterns of a dominant and recessive lethal allele? Is Huntington Disease caused by a dominant lethal gene or recessive lethal gene?arrow_forward
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