Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 14, Problem 7SQ
Summary Introduction
Introduction: Colorblindness (red-green colorblindness) is color vision deficiency, and colorblind individuals have different color perception. They have difficulty in seeing red, blue, green, or a combination of these colors. Gene expression in human body is required to form photopigments. The defects in these genes can cause colorblindness. It is a recessive X-linked condition.
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Chapter 14 Solutions
Biology: The Unity and Diversity of Life
Ch. 14 - Prob. 1DAACh. 14 - Prob. 2DAACh. 14 - Prob. 3DAACh. 14 - Prob. 4DAACh. 14 - Prob. 5DAACh. 14 - Prob. 1SQCh. 14 - Pedigree analysis is necessary when studying human...Ch. 14 - A recognized set of symptoms that characterize a...Ch. 14 - Prob. 4SQCh. 14 - A trait that is present in a male child but not in...
Ch. 14 - Choose the statement that is incorrect. a. A son...Ch. 14 - Prob. 7SQCh. 14 - Prob. 8SQCh. 14 - Klinefelter syndrome (XXY) can most be easily...Ch. 14 - Prob. 10SQCh. 14 - Does the phenotype indicated by the red circles...Ch. 14 - G6PD deficiency is an X-Linked recessive disorder....Ch. 14 - Marian syndrome (Section 13.5) is inherited in an...Ch. 14 - Duchenne muscular dystrophy, which is inherited in...Ch. 14 - Human females have two X chromosomes (XX); males...Ch. 14 - A mutation on an autosome causes a particular...Ch. 14 - Expression of the SRY gene on the Y chromosome...Ch. 14 - The somatic cells of most individuals with Down...Ch. 14 - Mutations in the genes for clotting factor VIII...
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- Alleles for Tay-Sachs disease are inherited in an autosomal recessive pattern. Why would two parents with a normal phenotype have a child with Tay-Sachs? a. Both parents are homozygous for a Tay-Sachs allele. b. Both parents are heterozygous for a Tay-Sachs allele. c. New mutations gave rise to Tay-Sachs in the child. d. b or carrow_forwardAssume that two parents with normal vision have a son who has red-green color blindness. Which parent is responsible for the son’s color blindness? a. the mother b. the father c. either parent d. None of these are correctarrow_forwardWhen crossing two fruit flies with red eyes, which is a dominant trait, half of the male offspring are born with white eyes, but none of the females are. What is this an example of? A. an autosomal recessive trait B. an autosomal dominant trait C. an X-linked recessive trait D. an X-linked dominant traitarrow_forward
- Brown hair is determined by an autosomal dominant allele: “B”. Blond hair is determined by the autosomal recessive allele: “b”. A.) George is heterozygous for this trait. What is his genotype? B.) What is George's phenotype for this trait? C.) What percent of George's sperm contain the B allele?arrow_forwardA trait that is present in a male child but not in either of his parents is characteristic of inheritance. a. autosomal dominant b. autosomal recessive c. X-linked recessive d. It is impossible to answer this question without more informationarrow_forwardif your phenotype is for a dominant trait, such as curly hair, then your genotype is? a: also for curly hairb: for both curly and straight hair c: a complex combination of all hair typesd: unknown, the alleles could be heterozygous or homozygousarrow_forward
- Colorblindness is a recessive x-linked trait. Which genotype represents a male with normal vision? a. XNXN b. XYN c. XnY d. XNYarrow_forwardBaldness is a phenomenon where individuals lose hair as they grow older. As an X-linked recessive gene, what instances do females manifest this trait? a. heterozygous recessive b. heterozygous dominant c. homozygous recessive d. homozygous dominantarrow_forwardA form of deafness is passed on in a large family in an autosomal recessive pattern. A woman in the family has two brothers with deafness. Neither of the woman's parents has hearing problems. What would be the probability of the woman to have the deafness allele?arrow_forward
- What is Polygenic Inheritance? A) When one gene has many effects B) The additive effect of 2 or more genes C) The genes that cause skin colorarrow_forwardColor blindness is a recessive X-linked trait. A normal couple has a color-blind child. At least one member of the couple's families is colorblind, who is this most likely to be?arrow_forwardOne 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_forward
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