WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 7, Problem 13SA
Summary Introduction
To analyze:
Why sex-linked recessive traits are more common in males than in females.
Introduction:
Sex-linked recessive traits are always alleles present on the X-chromosome, since out of the two sex chromosomes only the X-chromosome occurs in a pair (in females).
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Why are lethal dominant genes much more rare than lethal recessive genes?
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Chapter 7 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
Ch. 7 - Prob. 1SACh. 7 - Prob. 2SACh. 7 - Prob. 3SACh. 7 - Prob. 4SACh. 7 - Prob. 5SACh. 7 - Prob. 6SACh. 7 - Prob. 7SACh. 7 - Prob. 8SACh. 7 - Prob. 9SACh. 7 - Prob. 10SA
Ch. 7 - Prob. 11SACh. 7 - Prob. 12SACh. 7 - Prob. 13SACh. 7 - Prob. 14SACh. 7 - Prob. 15SACh. 7 - Prob. 1MCCh. 7 - Prob. 2MCCh. 7 - Prob. 3MCCh. 7 - Prob. 4MCCh. 7 - Prob. 5MCCh. 7 - Prob. 6MCCh. 7 - Prob. 7MCCh. 7 - Prob. 8MCCh. 7 - Prob. 9MCCh. 7 - Prob. 10MCCh. 7 - Prob. 11MCCh. 7 - Prob. 12MCCh. 7 - Prob. 13MCCh. 7 - Prob. 14MCCh. 7 - Prob. 15MCCh. 7 - Prob. 16MC
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- One form of the bleeding disorder known as von Willebrand disease is an autosomal recessive disease. A man who is a carrier marries a woman who is also a carrier of the disease. (a) What percentage of their children are likely to have a disease phenotype? (b) What percentage of their children are likely to have a normal phenotype? (c) What percentage of their children are likely to be carriers of the disease?arrow_forwardWhat do the terms genotype, phenotype, dominant, recessive, homozygous, and heterozygous mean?arrow_forwardWhy do males and females express recessive X-linked alleles differently?arrow_forward
- For sex-linked recessive traits, only females can be “carriers”, like how both Diana and Olivia are carriers for hemophilia. Why can’t males be carriers for these traits?arrow_forwardHow does the pedigree of an autosomal recessive trait differ from the pedigree of an X-linked recessive trait?arrow_forwardHow can you distinguish between an autosomal recessive trait with higher penetrance in males and an X-linked recessive trait?arrow_forward
- In a multigenerational study of a family, 8% of the males and 8% of the females have red hair. What may be the cause of this? A)Autosomal inheritance B)Environmental influence C)Sex-linked inheritance D)Non-somatic inheritancearrow_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_forwardIn genetics, what does a genotype of Hh signify? Choose 1 answer: Choose 1 answer: (Choice A) A Homozygous; two dominant alleles (Choice B) B Homozygous; two recessive alleles (Choice C) C Heterozygous; one dominant allele and one recessive allele (Choice D) D Homozygous; one dominant allele and one recessive allelearrow_forward
- What 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_forwardWhat is nondisjunction? Why does it cause chromosomal abnormalities? What is aneulploidy? Trisomy? Monosomy? Which kind of monosomy always results in miscarriage in early pregnancy? What do these terms mean: genotype, phenotype, allele, homozygous, heterozygous? Be able to recognize single gene inheritance patterns [autosomal dominant, autosomal recessive, X linked recessive] from a pedigree. Also, how are simple Mendelian traits transmitted? What genotype produces the phenotype? Why do some inheritance patterns result in many more males than females showing the phenotype? What inheritance patterns do Huntington disease and sickle cell anemia, and hemophilia follow (autosomal dominant or autosomal recessive, or X-linked recessive)? What are some of the symptoms of these diseases?arrow_forwardHypophosphatemia (vitamin D-resistant rickets) is inherited as a sex-linked dominant trait (H). A) A normal woman and a man with hypophosphatemia marry. What is the chance of having daughters with rickets? Sons? B) A heterozygous woman and a normal man marry. Does the mother have rickets? What is the chance of having daughters with rickets? Sons?arrow_forward
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