Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337670319
Author: STARR
Publisher: Cengage
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Chapter 14, Problem 1SQ
Summary Introduction
Introduction: A pedigree depicts the interrelationships between parents and offspring over generations for a particular trait. It is also referred to as a family tree. Individuals and relations are denoted by symbols and lines. It contributes in predicting the occurrence of that particular trait in future generations through inheritance patterns and genotyping the individuals.
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a. Is the trait indicated by the solid symbols inherited in a dominant or recessive manner? (2)
b. Give a definitive reason for your answer in (a). (This reason should not be skips a generation or doesn’t skip a generation).
c. Assign genotypes for individuals III-3 in both pedigrees.
. The accompanying pedigree concerns a rare inherited dental abnormality, amelogenesis imperfecta.a. What mode of inheritance best accounts for the transmission of this trait? b. Write the genotypes of all family members according to your hypothesis
Two pea plants that are true-breeding for recessive white flowers are mated and their offspring analyzed. Which of the following statements about this situation is true?
Group of answer choices
A)The offspring represent the P generation.
B)The gametes produced by the offspring will carry only one allele for this gene.
C)Both parents are referred to as heterozygotes.
D)Half of the offspring will be true-breeding for white flowers.
Chapter 14 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
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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- You are conducting a genetic experiment with flies. BB represents flies with black eyes and bb corresponded to flies with red eyes. You crossbreed Bb flies with other Bb flies. What will be the eye color of the offspring?arrow_forwardUsing the pedigree chart, explain: a) The number of generations seen. b) If all blue-coloured shapes are affected with disease X- how many males are affected? how many females are affected? c) Does this disease have a dominant or recessive inheritance pattern? Justify your answer.arrow_forwardFruit flies are very useful model organisms that have been used to study genetics. One mutant recessive trait in fruit flies is called "eyeless" because it causes flies to have no eyes. Cross an eyeless fly with a homozygous normal fly. a. Draw the Punnett square. b. What is the genotyoe ratio of the offspring? c. What is the phenotype ratio of the offspring? d. What genetic problem is this? (monohybrid, dihybrid or multiple allele)arrow_forward
- Genetics Constrict a Table: (i) Compare and contrast the down syndrome, pattau syndrome, turnor syndrome, Klinefelter syndrome, trisomy 21, trisomy 18. (ii) compare and contrast the different inheritance disorders in pedigree. (iii) compare and contrast the mendalin and non- mendalin types in detail (with all types). Thanks in advance.arrow_forwardBased off the information given, complete the table a. What mode of inheritance pattern best fits this pedigree in your opinion?arrow_forwardPart A) You cross a fly with straight wings with a fly with curved wings to produce the F1 generation, all of which exhibit straight wings. In the F2 generation, you observe 65 straight-winged flies and 16 curved-wing flies. Based upon the results, which phenotype is recessive? Part B) You think this trait is controlled by a single gene, but the F2 numbers don’t quite match a 3:1 expected ratio. Perform a chi-square analysis to determine if the variation you observe is due to chance or not. Based upon this determination, would you keep or reject the “null hypothesis”? Show your work and explain your reasoning.arrow_forward
- Suppose that for three generations, the clawed wing trait has only shown up in males. In the fourth generation, a mating between a clawed wing male and a normal wing female produces a clawed wing female. Does this necessarily mean that the trait is not sex-linked? Why or why not? (Sketching out a quick pedigree may help you answer)arrow_forwardGregor mendels experiments sought to discover if he could find the rules that govern A. Genetics B. Heredity C. Meiosis D. Mutationsarrow_forwardMendel's pea plants were a good choice for studying heredity, because: a) They have lots of easily observable traits that vary in an either-or manner. b) Their mating is uncontrollable. c) There are separate male and female plants. d) The plants are incapable of cross-pollination.arrow_forward
- A fungus with white spores cross fertilizes a fungus with black spores. If 10% of the progeny bear white spores while 90% of the progeny bear black spores, what must be true? A. The trait for spore color is determined by exactly one gene. B. The trait for spore color is determined by more than one gene. C. The allele for black spores is dominant over that for white spores. D. The allele for white spores is dominant over that for black spores.arrow_forwardA cross between two pea plants with genotypes PpLI and PpLI results in an F1 generation that is 25% PPLL, 50% PpLI, and 25% ppll. Which reason most likely explains why other possible genotypes are not present? Choose 1 answer. A.The genes underwent independent assortment B.The loci of the genes are close together. C.The loci of the genes are on different chromosomes. D.Crossing over occurred between chromosomes.arrow_forwardSuppose that two individuals who display toothed beaks mate and have three offspring who have toothed beaks and two who have normal beaks. Is it possible for the trait to be autosomal recessive? Why or why not? (Sketching out a quick pedigree may help you answer)arrow_forward
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