Genetics Study Guide 1
Genetics Study Guide 1 BIOL 3721 - 01
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This 8 page Study Guide was uploaded by Cherith Notetaker on Saturday September 19, 2015. The Study Guide belongs to BIOL 3721 - 01 at Youngstown State University taught by David K Asch, Chester R Cooper & Heather Elizabeth Lorimer in Fall 2015. Since its upload, it has received 74 views. For similar materials see Genetics in Biology at Youngstown State University.
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Date Created: 09/19/15
Genetics Study Guide Chapter 2 Key Terms and Concepts to Understand Monohybrid Cross Reciprocal Traits Law of Independent Assortment Dihybrid Cross Continuous Traits Test Cross Discrete Traits Law of Segregation Product Rule Punnet Square Sum Rule Pedigrees Inheritance Questions 1 Two longmaned unicorns are bred together and produce two longmaned foals and one shortmaned foal Based on this information can you determine how mane length is inherited 2 Among a certain faery population some individuals display a dominant phenotype trait called glass wingquot Other individuals have a recessive trait called vibrant that affects wing color Of the two traits which can be easily eliminated from the population via selective breeding Explain your answer 3 Is the disease in the pedigree dominant or recessive Explain Is the disease rare or common among the population Explain Chapter 3 Key Terms and Concepts to Understand Epistasis Reduced Penetrance Codominance Conditional Lethal Multifactorial Trait Incomplete Dominance Permissive Condition Pleiotropy Variable Expressivity Questions 1 A wild fruit tree bearing blue owers and spiky fruit is crossed with one bearing pink owers and smooth fruit The F1 generation is self pollinated to produce an F2 generation that has 602 spiky pink 198 smooth blue 1224 spiky purple 390 smooth purple 590 spiky blue and 198 smooth blue What is the inheritance of these traits 2 Ladybugs that have one allele for orange shell Os and one allele for yellow shell Os have orange shells Two orange shell ladybugs are mated and produce 406 orange offspring and 196 yellow offspring For every cross of the orange ladybugs the same orangeyellow ratio is obtained a Approximate the phenotype ratio for the offspring b Come up with your best explanation for the results C If an orange ladybug and yellow ladybug are mated together how many orange ladybugs and yellow ladybugs would you eXpect there to be out of a total of 360 offspring 3 Contrast epistasis and dominance Give the number of genes that are involved in these two cases Chapter 4 Key Terms and Concepts to Understand Chromosomes Cell Cycle Five Stages of Mitosis Meiosis I amp II SeX linked Inheritance Heterogametic SeX Homogametic SeX Questions 1 Is there any reason why meiosis would not occur in an organism that has a genome that is always haploid 2 Separation and migration of sister chromatids to opposite poles of the cell occurs in which phase of mitosis 3 Describe the various patterns for sex linked inheritance a X linked recessive b X linked dominant C y linked Answers Chapter 2 1 The allele for short manes is recessive to the allele for long manes 2 Glass wing dominant trait can be easily removed from the population through selective breeding The faeries with that allele can be easily recognized because the trait is eXpressed with only one allele 3 The disease is recessive because the affected person inherits both recessive alleles from to unaffected carriers It is common because individuals 3 and 4 from generation 11 produced two offspring who are in icted with the disease Chapter 3 l Spiky eXpresses complete dominance to smooth and the color of the owers indicates incomplete dominance 2a 23 orange and 13 yellow b OsOs is lethal c Will produce 180 orange shelled ladybugs and 180 yellow shelled ladybugs 3 Epistasis is when one alleles for one phenotype in uence the eXpression of the phenotype of another gene Two genes are involved in epistasis Dominance involves alleles of the same gene in which one gene is involved Chapter 4 1 The chromosomes in meiosis I must be homologous 2 Anaphase gt relate quotsisterquot to Ana lt 3a Occurs more commonly in males females would have to be homozygous in order to express Fathers pass on affected allele to daughters Carriers will pass the allele to half of their sons b The trait is present in every generation Fathers affected by the trait will have daughters that are affected and sons that are unaffected c Only male indiViduals are affected
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