Question

task

In connection with a paternity case where a woman posted 4 men as possible fathers (numbered 1-4) to her child, the persons involved were, among other things, examined for three autosomal blood type systems: AB0, MN and Rhesus, all inherited autosomally. The AB0 system is determined by two mutually co-dominant alleles, I^A and I^B, both of which are dominant to the third allele in the system, I⁰. In the MN system, there are two co-dominant alleles, L^M and L^N, while Rhesus is determined by two alleles, where Rh + dominates over Rh-. The phenotypes of mother, child and the four possible fathers are shown in the table below:
AB0 MN Rhesus
Mother A M Rh^pos
Children 0 MN Rh^pos
Male No. 1 0 M Rh^neg
Man No. 2 A N Rh^neg
Male No.3 B MN Rh^pos
Male no 4 AB MN Rhpos

a) Which of the four men can and which cannot be the child's biological father? Justify the answer!
b) Is it possible, based on the given phenotypes, to unambiguously join the mother and / or the child's genotypes in the three loci, if: (The answers are justified!)
i) the responses under a) are not involved?
ii) the responses under a) are included, assuming that one of the four men is actually the child's biological father?

Answer 1