In the 1950' s, a young woman sued film star/director Charlie Chaplin for parental support of her illegitimate child.Charlie Chaplin's blood type was already on record as type AB.The mother of the child had type O and her son had type B blood.Should the judge rule in favor or against the mother? A. For A.Goto question 13 B. Against B-Go to questience?

## Step 1<br />The problem involves understanding the inheritance of blood types. The ABO blood group system is determined by the ABO gene, which has three alleles: \(I^A\), \(I^B\), and \(i\). The \(I^A\) and \(I^B\) alleles are co-dominant, meaning that if both are present, they will both be expressed. The \(i\) allele is recessive and will only be expressed if no \(I^A\) or \(I^B\) alleles are present.<br /><br />## Step 2<br />A person with type AB blood has both \(I^A\) and \(I^B\) alleles. A person with type O blood has two \(i\) alleles. <br /><br />## Step 3<br />Given that Charlie Chaplin has type AB blood, he can only pass on either an \(I^A\) or an \(I^B\) allele to his offspring. The mother of the child has type O blood, so she can only pass on an \(i\) allele.<br /><br />## Step 4<br />The child has type B blood, which means he must have received an \(I^B\) allele from his father and an \(i\) allele from his mother. This is possible, as Charlie Chaplin could have passed on the \(I^B\) allele.<br /><br />## Step 5<br />Therefore, the judge should rule in favor of the mother, as it is possible for Charlie Chaplin to be the biological father of the child.