Time allowed 1 hr. 15 min.
Manx cats are tailless.
When two Manx cats mate two thirds of the kittens are tailless and one third have normal tails. In the following family there is a genetic disease present which is usually thought to be caused by an X linked recessive mutation. A number of Mendelian traits were examined in the pedigree below. Give two examples of recurrent mutations caused by duplicated DNA sequences. In the family shown below two baby boys have been born who are now showing the symptoms of muscular dystrophy.