A geneticist studies a series of characteristics in pairs of monozygotic and dizygotic twins, obtaining the concordances listed below. For each characteristic, indicate whether these concordances suggest genetic influences, environmental influences, or both. Explain your reasoning. Concordance (%) Characteristic Monozygotic Dizygotic Migraine headaches 60 30 Eye color 100 40 Measles 90 90 Club foot 30 10 High blood pressure 70 40 Handedness 70 70 Tuberculosis 5 5

A geneticist studies a series of characteristics in pairs of monozygotic and dizygotic twins, obtaining the concordances listed below. For each characteristic, indicate whether these concordances suggest genetic influences, environmental influences, or both. Explain your reasoning. Concordance (%) Characteristic Monozygotic Dizygotic Migraine headaches 60 30 Eye color 100 40 Measles 90 90 Club foot 30 10 High blood pressure 70 40 Handedness 70 70 Tuberculosis 5 5

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Description: A geneticist studies a series of characteristics in pairs of monozygotic and dizygotic twins, obtaining the concordances listed below. For each characteristic, indicate whether these concordances suggest genetic influences, environmental influences,

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter18: Genetics Of Behavior

Section: Chapter Questions

Problem 14QP: A pedigree analysis was performed on the family of a man with schizophrenia. Based on the known...

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A geneticist studies a series of characteristics in pairs of monozygotic and dizygotic twins, obtaining the concordances listed below. For each characteristic, indicate whether these concordances suggest genetic influences, environmental influences, or both. Explain your reasoning. Concordance (%) Dizygotic Characteristic Monozygotic Migraine headaches 60 30 Eye color 100 40 Measles 90 90 Club foot 30 10 High blood pressure 70 40 Handedness 70 70 Tuberculosis
Suppose that a geneticist studies a series of characteristics in monozygotic twins and dizygotic twins. He finds various rates of phenotypic concordance for the characteristics, as shown in the table. Rate of phenotypic concordance (%) Characteristic Monozygotic Dizygotic migraine headache 60 30 eye color 100 40 measles 90 90 clubfoot 30 10 high blood pressure 70 40 handedness 70 70 tuberculosis Classify each characteristic according to whether the corresponding rates of concordance indicate a genetic influence, an environmental influence, or both genetic and environmental influences.
Assumptions: . If the parent expresses the trait, they are homozygous dominant If the child/children express the trait but the parents do not, the parents are heterozygous. Traits selected: Brown Hair/Eyes And Widows Peak Write the Letters you will be using n the Punnet square for each trait: _Ww Bb_and_ww Bb_ Father Genotype: WW Bb Mother Genotype: ww Bb Parent Gametes possible gametes: possible gametes: Do you have the phenotype of either of the traits in the cross? If you do, which one? Are there any other offspring with either trait? Which trait? Which phenotypic probability did you fall into? Which phenotypic probability did other offspring fall into? I
Sue suffers from Marfan Syndrome, an autosomal dominant connective tissue disorder (noted as allele A), and is married to Joe, who does not have this trait. Out of their five children, only one, Tucker, has Marfan Syndrome. Based on the information above, fill in the blanks for the genotype of each person(s) listed below. HINT: type in "AA", "Aa", or "aa". If more than one genotype is possible for any person(s), then write only one of the possible genotypes. Sue's genotype is: Joe's genotype is: Tucker's genotype is: Tucker's siblings' genotypes are:
Draw a punnett square for each problem. Please be careful to notice whether a trait is homozygous or heterozygous. In rabbits it has been shown that albino (white) is recessive to the brown color, such as in the wild rabbit. If a homozygous albino rabbit and a homozygous brown rabbit are bred, what will be the color ratio of the first generation? Answer:___________brown _____________tan______________white 2. If a pure (homozygous) white guinea pig is bred with a hybrid (heterozygous) black guinea pig, what would be the probable color ratio of the next generation? Black is dominant. White is recessive. Answer:___________black _____________gray _____________white Thank you.
Using the two equations, p + q = 1 and p2 + 2pq + q2 = 1, answer the following questions. Maple Syrup Urine Disease (MSUD) is an autosomal recessive condition that causes intellectual and physical disabilities, difficulty feeding, and a sweet maple syrup odor to the urine. In Costa Rica, the incidence of MSUD is calculated as approximately 1 in 8,000 newborns. Calculate the allele frequencies for the normal and disease alleles.
Assume that the concordance value for a particular trait is 85% for both monozygotic and dizygotic twins. What can be concluded about this trait? ○ It is caused by environmental factors in dizygotic twins but by genetic factors in monozygotic twins. It is likely caused almost exclusively by genetic factors. It is caused by both genetic factors and environmental factors. It is likely caused almost exclusively by environmental factors. It is caused by genetic factors in dizygotic twins but by environmental factors in monozygotic twins. Incorrect
Achondroplasia is a hereditary condition caused by a dominant allele in humans (dominant allele A). This disorder affects bone growth specifically in long bones of the upper and lower limbs by preventing the ossification of bones from cartilage. Determine the genotypes of the parents and offspring for the following family scenarios in a and b below. One parent with the Achondroplasia phenotype and a normal parent have 2 children. Both children have the Achondroplasia phenotype NOTE: You must draw a Punnet square to determine the possible genotypes of te children. When two alternative genotypes are possible for an individual, indicate both.
List any phenotypes (e.g., physical or behavioral) that might differ between the average person who is a twin and the average person who is a singleton. Explain your answer (provide an external source, if possible). For most phenotypes, are twins representative of the general population? Why or why not? Do you think the experience of being an MZ twin is very different from being a DZ twin? In which ways?
Dimples (D) are a dominant trait genetic trait. Complete a Punnett Square to determine the possible phenotypes and genotypes of a cross between a man who is homozygous dominant and a heterozygous woman. Choose the percentages correctly below. Dimples: 0% 25% 50% 75% 100% No dimples: 0% 25% 50% 75% 100% DD: 0% 25% 50% 75% 100% Dd: 0% 25% 50% 75% 100% dd: 0% 25% 50% 75% 100%
Blood type is determined by multiple codominant alleles of the I gene, IA, IB, and i, where ii results in type O. The genotypes of a husband and wife are IAIB x IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible? Group of answer choices 2 genotypes, 3 phenotypes 4 genotypes, 3 phenotypes 3 genotypes, 3 phenotypes 3 genotypes, 4 phenotypes
The letter that accompanies each trait is representative of the dominant allele. This is the letter you will use when recording the genotypic information for each trait. Read through the descriptions of the trait and determine which phenotype you express. Record your phenotype. Next, determine the genotype. If you express the dominant phenotype, you cannot determine the second allele you carry, so you must list the two possible genotypes. Record this down Question: Widow’s Peak (W): A hairline that forms a downward point in the middle of the forehead is caused by a dominant allele. A smooth hairline is caused by a recessive genotype.