Homework Help: Biology

Posted by Michelle on Monday, December 14, 2009 at 5:54pm.

Dr. Paul is blood type O. His father was blood type A and his mother was blood type B. What were the genotypes of his parents and what are the possible blood types and ratios expected for crosses involving these parental genotypes?

Biology - SraJMcGin, Monday, December 14, 2009 at 9:30pm
You might look at some of the links here:

http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla:en-US:official&hs=a02&ei=l_QmS6CfPNWEnQfrn_ScDQ&sa=X&oi=spell&resnum=0&ct=result&cd=1&ved=0CAYQBSgA&q=If+father%27s+blood+type+A+and+mother+is+B,+could+the+child+be+type+O&spell=1

Sra
Biology - PsyDAG, Tuesday, December 15, 2009 at 10:40am
Dr. Paul must have received an O gene from each parent, but they also had A (dad) and B (mom) genes. That should give you their genotypes. Using a Punnett square should answer your last question. (See one of SraJMcGin's sources.)

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