two genetics questions

[kahle]

What percentage of offspring will be expected to have blood type A if the parents have types AB and O? What percentage will have blood type O? I can do Punnett squares but what is the second allele for blood type O?


Also, a wild-type fruit fly (heterozygous for both body color and eye color) is mated with a fly exhibiting two recessive mutations, ebony body and sepia eye. The offspring distribution is 100 wild body/wild eye, 34 wild body/sepia eye, 30 ebony body/wild eye, and 94 ebony body/wild eye. Are the genes for these two mutations linked or not? Explain.
Why didn't the problem read 124 ebony body/wild eye? Help?

[canalon]

In the ABO system you have three possible alleles: A, B and O, and each chromosome carry only one allele at a time. A and B are codominant, O is recessive.
You now have everything you need to complete your Punnet square.

What is expected here is a comparison using Chi-square test between the theoretical/expected distribution of the offspring if the characters are independent and what is observed in real life.

Good luck

[kahle]

In the ABO system you have three possible alleles: A, B and O, and each chromosome carry only one allele at a time. A and B are codominant, O is recessive.
You now have everything you need to complete your Punnet square.

What is expected here is a comparison using Chi-square test between the theoretical/expected distribution of the offspring if the characters are independent and what is observed in real life.

Good luck

Thanks! I get it now! 50% blood type A (AO) and 50% blood type B (BO)! Great!
Happily, Kahle

[Jesse2504]

This may help visualize it a bit better:

[kahle]

Thanks so much! Kahle