14. Patients with familial retinoblastoma carry a germline mutation in one copy of the rb gene. Potential mechanisms for inactivation of the other allele in a retinoblastoma tumor arising in one of these patients include a)An independent point mutation b) Loss of the normal chromosome 13 c)Mitotic crossing over d )all of the above e)None of the above 15. Autism is a common neurodevelopmental disorder. Which of the follow symptoms is not typical in Autism patients? a) Delayed physical growth b)Inappropriate toy play d) Lack of awareness of danger c) Hyperacti e) Inability to relate to other people 16. Chromosome aberrations are characterized by missing, extra, or irregular portion of chromosomal DNA. Which of the following genetic defects is not caused by chromosome aberrations? b)Klinefelter syndrome c)Turner Syndrome d) Cri-du-chat syndrome e) Marfan Syndrome 17. Neural tube defects are one of the most common birth defects affecting over 300,000 births globally each year. Which of the following ones is not a type of neural tube defect? a)Craniorachischisis b) meningocele c)Anen d)In e)Polymelia a) Turner syndrome b)lhon c) Mad cow disease d DMd e)Spina Bifida 19. Which of following is not at correct match between the named individual named and listed contribution to genetics? a)Gregor Mendel: discovered simple patterns of inheritance of discrete traits14. Patients with familial retinoblastoma carry a germline mutation in one copy of the Rb gene. Potential mechanisms for inactivation of the other allele in a retinoblastoma tumor arising in one of these patients include: a) An independent point mutation b) Loss of the normal chromosome 13 c) Mitotic crossing over d)All of the above e)None of the above 15. Autism is a common neurodevelopmental disorder. Which of the follow symptoms is not typical in Autism patients? a) Delayed physical growth b) Inappropriate toy play d) Lack of awareness of danger c) Hyperactivity or passiveness e) Inability to relate to other people 16. Chromosome aberrations are characterized by missing, extra, or irregular portion of chromosomal DNA. Which of the following genetic defects is not caused by chromosome aberrations? a) Jacobsen syndrome b) Klinefelter syndrome c) Turner Syndrome d) Cri-du-chat syndrome e) Marfan Syndrome 17. Neural tube defects are one of the most common birth defects, affecting over 300,000 births globally each year. Which of the following ones is not a type of neural tube defect? a) Craniorachischisis b) Meningocele c) Anencephaly d) Iniencephaly e) Polymelia 18. Which is prion disease: a) Turner syndrome b) LHON c) Mad cow disease d)DMD e)Spina Bifida 19.Which of following is not at correct match between the named individual named and listed contribution to genetics? a) Gregor Mendel: discovered simple patterns of inheritance of discrete traits