Genetics Flashcards
(5 cards)
Remember Blood type alleles show Codominance. A woman with Type O blood has a child with Type O blood. She claims that a man with Type AB blood is the biological father. Is this possible that he is the father? Explain your answer
No, it is not possible that he is the father. A female with type O blood (ii) & a male with type AB (IAIB) blood would be able to produce children with type A or B blood. The child has Type O blood (ii) which means the child inherited the recessive i allele from the biological father and the recessive i allele from the mother
A woman who is type A (IAi) blood has a child of type AB blood. Her husband has type B (IBi) blood. Is he the biological father of this child? Why not?
Yes, he can be the biological father. The child received the A allele from its mother & received the B allele from his biological father to have type AB blood
If a person is Hh for hypercholesterolemia, could this be a problem? Why or Why not?
Yes, because hypercholesterolemia shows incomplete dominance. A heterozygous person will have mild disease & more prone to heart attacks. Their blood cholesterol will range from 250-400 when it should be below 200. They will need cholesterol reducing drugs such as Lipitor
Is it possible for two brown grizzly bears fur to produce offspring with yellow (blonde) fur grizzly bear? Explain your answer
Yes it is if both parent bears Bb were heterozygous for yellow fur.
You can see yellow fur grizzlies in Alaska
Is it possible for a couple who are both Rh+ to produce a child that is Rh -? Explain your reasoning
If both parents are heterozygous for the Rh factor + -, then there is a 25% chance of producing an Rh- child
