Questions

Here are some questions to help you practice tonight, just in case you are uneasy about the problems from class today.

1)  A paternity issue has come up.  The child has blood type A, the mother has blood type B, and the alleged father has blood type O.  Can this be his child?  Justify your answer with a punnett square.
2)  In cats, a condition called manx exists.  Manx cats have a naturally occurring mutation of the spine, which usually causes them to be tailless (no tail.)  When pure breeding long tail cats are bred with tailless manx cats, cats with tails that are short and stubby are usually produced.  Based on this information, what can you conclude about the inheritance pattern of tail length in cats?
3)  For the following conditions, determine if they are inherited as autosomal dominant, autosomal recessive, or sex-linked recessive:  Sickle cell disease, cystic fibrosis, achondroplasia, Huntington's disorder, hemophilia, PKU, colorblindness, Tay-Sachs.

If you have questions, I will be checking in until around 9:30.  I'm pretty tired tonight.:)