Examination Paper for Evolutionary and Developmental Zoology, Semester II, 2009/2010, Exams of Zoology

Download Examination Paper for Evolutionary and Developmental Zoology, Semester II, 2009/2010 and more Exams Zoology in PDF only on Docsity! Semester Il Examinations 2009/ 2010 Exam Code(s) 4BS2 Exam(s) 4th Year Undenominated Science Module Code(s) Z0409 Module(s) Evolutionary and Developmental Zoology Paper No. 1 External Examiner(s) Professor M. Davies Internal Examiner(s) *Professor W. Arthur Dr. U. Frank Dr. G. McCormack Instructions: Answer four questions Duration 3 hrs No. of Pages 2 Department(s) Zoology 1. Induced pluripotent stem (iPS) cells are a relatively recent breakthrough in developmental/cell biology. Which two big problems, associated with the use of human embryonic stem cells in regenerative medicine, do iPS cells potentially sort out; and which other two problems are they unable to resolve? Explain. 2. A biologist, who was interested in evo-devo, attempted to investigate the evolution of stem cells. For this, she decided to study stem cell biology in the planarian Schmidtea mediterranea. Describe one possible strategy you would recommend the researcher to adopt in order to obtain evidence for common ancestry of planarian and mammalian stem cells. 3. Explain the relationship between the following three categories of genes: developmental genes; homeobox genes; Hox genes. Discuss the role of Hox genes in animal development.