Basic Medical College of Fudan University Final Exam of Medical genetics in 2015-2016(1) MBBS B ame Student number: section A B C Total scores scores A. Multiple choice questions(select the single correct answer( 20%) 1. Which of the following comprises the smallest percentage of human nuclear genome? a)RNA genes b) heterochromatin c)retroviral/transposon-derived sequences d) protein coding sequences e)other sequences 2. Which of the following is not a component of human nuclear chromosomes? a)D-loops b)telomeres centromere d) heterochromatin e)euchromatin 3. Which of the following is a true statement? a)Spermatogenesis and oogenesis both begin post-puberty b) Spermatogenesis begins in the early fetus and is completed soon after birth c)Oogenesis is initiated just prior to birth and continues after pub d)Oogenesis is initiated in the early fetus and continues after puberty e)Oogenesis is completed prior to birth 4. Recom bination between the y chromosome and the x chromosome occurs a)within the pseudo-autosomal regions of the Y and x chromosomes during meiosis in b)within the pseudo-autosomal regions of the Y and X chromosomes during meiosis males c) within the pseudo-autosomal regions of the y and X chromosomes during mitosis in femalesBasic Medical College of Fudan University Final Exam of Medical Genetics in 2015-2016 (1) MBBS □ B Name ： Student Number： section A B C Total scores scores A. Multiple choice questions (select the single correct answer)( 20%) 1. Which of the following comprises the smallest percentage of human nuclear genome? a) RNA genes b) heterochromatin c) retroviral/transposon-derived sequences d) protein coding sequences e) other sequences 2. Which of the following is not a component of human nuclear chromosomes? a) D-loops b) telomeres c) centromeres d) heterochromatin e) euchromatin 3. Which of the following is a true statement? a) Spermatogenesis and oogenesis both begin post-puberty b) Spermatogenesis begins in the early fetus and is completed soon after birth c) Oogenesis is initiated just prior to birth and continues after puberty d) Oogenesis is initiated in the early fetus and continues after puberty e) Oogenesis is completed prior to birth 4. Recombination between the Y chromosome and the X chromosome occurs: a) within the pseudo-autosomal regions of the Y and X chromosomes during meiosis in females. b) within the pseudo-autosomal regions of the Y and X chromosomes during meiosis in males. c ) within the pseudo-autosomal regions of the Y and X chromosomes during mitosis in females