CSI: Helena High Blood Typing Problems
Define the following and give examples of each:
1. homozygous=_________________________________________________
2. heterozygous =________________________________________________
3. allele =_______________________________________________________
4. recessive =____________________________________________________
5. dominant =____________________________________________________
6. co-dominance =________________________________________________
Problems: You Are The Forensic Expert
The following are actual questions received by forensic geneticists, as a practical
exercise, please assume the role of the aforementioned geneticist and answer
each question clearly and confidently using the above words and punnet square
illustrations.
1.Could you please help me? I have a question that is NOT a
homework question. I am a Junior in High School. "Could a
man with type B blood and a woman with type AB produce a
child with type O blood?" I think not, because type O is
recessive, and the B's seem to be dominant. My cousin
thinks yes. Thank you for your help. Explain using punnet
squares.
-- Vicki
2. What if the mother is type O+ and the father is A-? What
would the offspring's blood type be? --Mark
3. If the mother of a child is blood type O+ and the child
is A-, what blood type would the father be? Does the Rh
factor of the child being - mean that one of the parents
has to be negative? Both of my parents are Rh - all of us
siblings are Rh- as well. Could two Rh- parents give birth
to a Rh+ child? and versi versa? Thanks for all your help.
--MaryEllen
4.I have been reading your info about inheritance of blood
types and I am getting very confused! I am trying to figure
out what blood type the father of my son could have since
my son and I are both type A+. Also, my brother is type 0
and my mom is A+. We can't find anything that explains how
this can be. Could you please help??? --From a concerned
Mom
5. I am wondering how to find out blood type of my
grandson...my daughter is A+..father is in question...she
is stressed to the max on the father of this baby boy.
What is the most common blood type and the most common
donor and common receiver?
Here is the scenario....paternity isn't going to be
established...it is going to lay...for lack of a better
expression. My daughter is type A, my grandson is type B+,
we do not know the types of the two gentlemen in
question...my question is what are the types that the
fathers would have to be in order for him to be a B+?