CAMPBELL MASTERING BIOLOGY ACCESS>I<
18th Edition
ISBN: 9781323766286
Author: Pearson
Publisher: PEARSON
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Chapter 14.5, Problem 2CC
Summary Introduction
To explain:
The gene expression in the individuals heterozygous for the sickle cell allele shows effects of the allele under some circumstances.
Introduction:
The sickle cell anemia is a genetic disorder. This occurs due to the mutation in the hemoglobin chain which results in the change of shape of hemoglobin. The hemoglobin gets sickle shape. Due to its sickle shape, the binding affinity of hemoglobin towards oxygen decreases.
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MAKE CONNECTIONS In a research article aboutalkaptonuria published in 1902, Garrod suggested thathumans inherit two “characters” (alleles) for a particularenzyme and that both parents must contribute a faultyversion for the offspring to have alkaptonuria. Today,would this disorder be called dominant or recessive?(See Concept 14.4.)
MAKE CONNECTIONS Given that changes in morphologyare often caused by changes in the regulation of geneexpression, predict whether noncoding DNA is likely to beaffected by natural selection. See Concept 18.3 to reviewnoncoding DNA and regulation of gene expression.
Genetics Question:
In humans, an allele for black hair in one gene can mask the expression of color on a secondgene. In one family with 10 children, 7 have black hair like their parents, 2 with red hair, and onewith blond hair. The blond child soon came of age and married a man with red hair. All their children have red hair.
a. What specific mode of inheritance is exhibited?
b. Using the letters A and B, assign alleles to the traits
c. Based on the 9:3:3:1 ratio, what are the genotypes of the following:
7 children with black hair ________________ 2 children with red hair ___________________ 1 child with blond hair ____________________
d. Give the COMPLETE genotypes of the following: Parents of the children ____________________ Man with red hair _________________________ All children (of the man) with red hair ________________
Chapter 14 Solutions
CAMPBELL MASTERING BIOLOGY ACCESS>I<
Ch. 14.1 - MAKE CONNECTIONS In a research article about...Ch. 14.1 - What polypeptide product would you expect from a...Ch. 14.1 - DRAW IT The template strand of a gene contains the...Ch. 14.2 - What is a promoter? Is it located at the upstream...Ch. 14.2 - What enables RNA polymerase to start transcribing...Ch. 14.2 - WHAT IF? Suppose X-rays caused a sequence change...Ch. 14.3 - Given that there are about 20,000 human genes, how...Ch. 14.3 - How is RNA splicing similar to how you would watch...Ch. 14.3 - WHAT IF? What would be the effect of treating...Ch. 14.4 - What two processes ensure that the correct amino...
Ch. 14.4 - Discuss the ways in which rRNA structure likely...Ch. 14.4 - Describe how a polypeptide to be secreted is...Ch. 14.4 - WHAT IF? DRAW IT Draw a tRNA with the anticodon...Ch. 14.5 - What happens when one nucleotide pair is lost from...Ch. 14.5 - Prob. 2CCCh. 14.5 - WHAT IF? DRAW IT The template strand of a gene...Ch. 14 - In eukaryotic cells, transcription cannot begin...Ch. 14 - Prob. 2TYUCh. 14 - The anticodon of a particular tRNA molecule is A....Ch. 14 - Prob. 4TYUCh. 14 - Which component is not directly involved in...Ch. 14 - Prob. 6TYUCh. 14 - Prob. 7TYUCh. 14 - Prob. 8TYUCh. 14 - Fill in the following table: Type of RNA Functions...Ch. 14 - SCIENTIFIC INQUIRY Knowing that the genetic code...Ch. 14 - Prob. 11TYUCh. 14 - FOCUS ON INFORMATION Evolution accounts for the...Ch. 14 - SYNTHESIZE YOUR KNOWLEDGE Some mutations result in...
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- Discuss Concepts Many human diseases are caused by recessive alleles that are not expressed in heterozygotes. Some people think that eugenicsthe selective breeding of humans to eliminate undesirable genetic traitsprovides a way for us to rid our populations of such harmful alleles. Explain why eugenics cannot eliminate such genetic traits from human populations.arrow_forwardThe good genes hypothesis is a theory that explains what? why more fit individuals are more likely to have more offspring why alleles that confer beneficial traits or behaviors are selected for by natural selection why some deleterious mutations are maintained in the population why individuals of one sex develop impressive ornamental traitsarrow_forwardBeadle and Tatum’s BEST contribution to how gene expression is understood can be summarized as what? A. One gene produces one protein. B. Independent assortment occurs. C. DNA is the genetic molecule. D. Information flows from DNA to RNA to protein.arrow_forward
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