ETHC 210 Exam 3 - Questions and Answers

ETHC 210 Exam 3 Question 1 In autosomal dominant inheritance a trait can appear in either sex because an autosome (non-sex chromosome) carries the gene. Question 2 The “A” and “B” alleles in the ABO blood group are recessive to blood type “O.” Question 3 Mitochondrial genes are primarily transferred from fathers to their children. Question 4 In order for a child to get the genetic based disease cystic fibrosis which of the following must occur? Question 5 The control of most human traits by single genes is rare because most traits are the results of multiple genes like human eye color. Question 6 Protein tau can form sticky“tangles” as part of the cause of Alzheimer disease. Question 7 The Mitochondrial Eve theory is a theory about: Question 8 The law of segregation states that alleles of a gene: Question 9 Leber congenital amaurosis and osteogenesis imperfecta are both genetic diseases demonstrating: Question 10 Achondroplastic dwarfism is considered a lethal genetic syndrome because; Question 11 A single gene disorder with many symptoms, or a gene that controls several functions or has more than one effect is termed: Question 12 A Punnet square follows transmission of alleles and is based on probability. Question 13 A phenotype is the trait that you see or can observe. Question 14 What percent of cases of Alzheimer disease are familial (inherited)? Question 15 In Alzheimer disease which parts of the brain are affected? Question 16 A single gene OCA2 on chromosome 15 confers eye color by controlling melanin synthesis. But also a second gene can influence the expression of OCA2. Question 17 Which of the following is true about the Jumping Frenchmen of Maine syndrome Question 18 The OCA2 gene confers eye color such that the recessive condition (two recessive alleles) results in: Question 19 A mutated recessive allele can never contribute to disease. Question 20 Using and understanding pedigrees are important today because they help families identify the risk of transmitting an inherited disease Question 21 Because Huntington’s disease is so deadly most people alive who have it are children. Question 22 Mendel crossed some yellow round pea plants with wrinkled green pea plants. The traits of yellow and round were dominant. In the first generation, the F1 generation all the offspring were; Question 23 Which of the following is true about Huntington’s disease. Question 24 LDL is the carrier of cholesterol in blood. Question 25 The ABO blood group alleles found in the human population are an example of;