The gene family (genes $A, B,$ and $D$ ) determining MHC on the cell surface in humans is on a single chromosome. A father's MHC genotype is $\mathrm{A} 1, \mathrm{A} 3, \mathrm{B} 5, \mathrm{B} 7, \mathrm{D} 9, \mathrm{D} 11$
A mother's genotype is $A 2, A 4, B 6, B 7, D 11, D 12 .$ Their child's is $\mathrm{A} 1, \mathrm{A} 4, \mathrm{B} 6, \mathrm{B} 7, \mathrm{D} 11, \mathrm{D} 12 .$ What are the parents
haplotypes-that is, which alleles are linked on each of the two chromosomes of each parent? Assuming there is no recombination among the genes determining the MHC type, can these same two parents have a child who has the genotype $A 1, A 2, B 7, B 8, D 9, D 11 ?$