IB+genetics+revision

Try the following questions (either with books open or closed depending on your confidence). Then in groups of 3 work together to produce a model answer. Lastly go through the mark scheme and improve your work.

//N.B. learning is an active process, if you are not involved and 'doing something' you will not retain the understanding for long.//

> > 1.1 What evidence is given in the pedigree chart below to establish that the condition is caused by a dominant allele? > > > > A.Two unaffected parents have unaffected children. > B.Two affected parents have affected children. > C.An affected parent and an unaffected parent have affected children. > D.Two affected parents have an unaffected child. > > 1.2 Boys can inherit the recessive allele (//c//) that causes red-green colour blindness from their mother, not from their father. The allele for normal red and green vision is //C//. Which of the following genotypes are possible in men? > A. //c// only > B. //C// or //c// only > C. //CC// or //cc// only > D. //CC//, //Cc// or //cc// only > > 1.3 What conclusion can be made from the following evidence from an analysis of DNA fragments? > > > > A. Both children are related to both parents. > B. Child I is related to the man but child II is not. > C. Both children are unrelated to either of the parents. > D. Child II is related to the man but child I is not. > > inserted. State the name of a small circle of DNA, used for DNA transfer, in bacteria.//[1 Mark]// > > (b) The diagram below shows a cut circle of DNA into which a gene is being inserted. Before it can be transfered into a bacterium, the ring must be altered, using an enzyme. > > > > Outline what must be done next to complete the process of gene insertion into the DNA circle, including the name of the enzyme that is used. //[2 Marks]// > > (c) Discuss the potential benefit and possible harm of **one named** example of gene transfer between species. //[3]// >
 * 1) Complete the multichoice questions on theoretical genetics and DNA analysis :
 * 1) (a) Gene transfer to bacteria often involves small circles of DNA into which genes can be
 * 1) Describe the inheritance of ABO blood groups. //[9 marks]//

//Last and most import task is to review and revise your notes. Any learning should be recorded so that you can review it later.//