Why does this article stress "UPD"? Because many online answer keys from 2010-2018 contain three major errors that we have corrected here:
:
), there may be a biological "mystery" or adoption, as an AB parent cannot typically have an O child. lab activity blood type pedigree mystery answer key upd
Father (AB) x Mother (O)
Step 1: Start with the RecessivesThe easiest way to begin solving the mystery is to look for individuals with Type O blood. Because Type O is recessive, their genotype must be OO. Write this down immediately. Why does this article stress "UPD"
If you get stuck, always start at the bottom of the pedigree: Find the or Rh- individuals first. Give one of their recessive alleles to each parent. This usually reveals the "hidden" alleles ( −negative ) of the parents.
To help you update your own lab manual, here is a clean for the most likely questions: Because Type O is recessive, their genotype must be OO
The AB father cannot contribute an i allele; therefore O child impossible.