Inquiry Into Life (16th Edition)
16th Edition
ISBN: 9781260231700
Author: Sylvia S. Mader, Michael Windelspecht
Publisher: McGraw Hill Education
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Chapter 23, Problem 2TC
How would you determine whether a disease in humans is simply polygenic or and environmental influence?
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A dominant gene R and the recessive a causes retinitis pigmentosa, a form of blindness in man. Thus only rrA_ individuals are normal. A couple, both afflicted, have five children: four afflicted and one normal.
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Why do polygenic characteristics have many phenotypes?
Why are most genetic diseases caused by recessive alleles?
Chapter 23 Solutions
Inquiry Into Life (16th Edition)
Ch. 23.1 - Describe how Mendel's law of segregation and law...Ch. 23.1 - Define the term allele, and explain what it means...Ch. 23.1 - Contrast genotype and phenotype, and use...Ch. 23.1 - Predict outcome ratios and probabilities for...Ch. 23.1 - Prob. 1QTCCh. 23.1 - 2. Decide the reasons listed in the feature, what...Ch. 23.1 - Prob. 3QTCCh. 23.1 - Distinguish between the terms genotype and...Ch. 23.1 - Explain the purpose of testcross.Ch. 23.1 - Prob. 3CYP
Ch. 23.1 - Describe the types of process that result in a 3:1...Ch. 23.2 - Recognize autosomal dominant and autosomal...Ch. 23.2 - Analyze pedigree to determine the probability of a...Ch. 23.2 - Describe the characteristics of a Pedigree for an...Ch. 23.2 - Prob. 2CYPCh. 23.3 - Prob. 1LOCh. 23.3 - Prob. 2LOCh. 23.3 - Describe polygenic inheritance.Ch. 23.3 - What would be the potential consequences if one of...Ch. 23.3 - Prob. 2QTCCh. 23.3 - Prob. 1CYPCh. 23.3 - Prob. 2CYPCh. 23.4 - Prob. 1LOCh. 23.4 - Understand how scientists determine the effect of...Ch. 23.4 - Prob. 1CYPCh. 23.4 - Prob. 2CYPCh. 23 - Prob. C2BYBCh. 23 - Prob. S5.4BYBCh. 23 - Prob. S5.6BYBCh. 23 - The law of segregation states all of the following...Ch. 23 - Prob. 2ACh. 23 - Prob. 3ACh. 23 - Prob. 4ACh. 23 - Prob. 5ACh. 23 - Prob. 6ACh. 23 - Which of the following does not have an autosomal...Ch. 23 - 8. Which of the following does not describe the...Ch. 23 - Prob. 9ACh. 23 - Prob. 10ACh. 23 - Prob. 11ACh. 23 - Prob. 12ACh. 23 - Prob. 1TCCh. 23 - How would you determine whether a disease in...Ch. 23 - Prob. 3TC
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- What are Polygenic and Multiple allele?arrow_forwardHow do you think consanguinity is increasing the risk factors of genetic disorders? Explain with examples (at least two). It won’t be possible to change the tradition all of a sudden. If you are a clinical geneticist, how you will be managing this type of community?arrow_forwardWhat are the two alleles for somebody who Marfan syndrome, a dominant disease? What allele would be the healthy allele, and which one would be the allele for Marfan syndrome?arrow_forward
- When a disease is due to polygenic inheritance, the following is probably true: A. Many factors, both genetic and environmental, contribute to the disease traits. B. It is caused by one gene with a large number of alleles. C. It affects a large number of people. D. It has many different symptomsarrow_forwardFigure 3 shows the karyotypes of two individuals suffering from a genetic disorder. a) Name the genetic disorder for individuals A and B. b) Give three characteristics of individual B. c) What is the gender of individual A?arrow_forwardWhat is a Punnett square used for? Group of answer choices To see the possible genotypes of the offspring The solve complex mathematical equations To determine which genetic disease you may have To determine the phenotypes of two parentsarrow_forward
- A man is a homozygous for a disease. He marries a woman who is heterozygous for the disease. A son and a daughter were born to them. The daughter has the disease but the son is only a carrier. Their daughter then marries a man who is normal for the disease. Two daughters who both have the disease were born to them. What are the genotypes of all of them?arrow_forwardHow can the same phenotype stem from many different genotypesarrow_forwardHow would you find out if the causes of variations is genetic or environmental?arrow_forward
- Why are phenotypes the product of both their genes and their environments?arrow_forwardHow does the physical storage of information in DNA influence the phenotype of an individual? Why does it matter how the information is stored?arrow_forwardWhat is biological determinism? (Hint: are you destined to have the phenotype typically associated with your genotype? Do your genes determine your destiny?) Explain the misconception of biological determinism.arrow_forward
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