Q. The ancestry of a white female tiger bred in a city zoo is depicted in the following pedigree. White tigers are indicated with unshaded symbols. (As you can see, there was considerable inbreeding in this lineage. For instance, the white tiger Mohan was mated with his daughter). In answering the questions, assume that hite? Is determined by allelic differences at a single gene and that the trait is fully penetrant. Explain the answers by citing the relevant information in the pedigree. Could white coat colour be caused by a-

a. Y-linked allele?
b. dominant X-linked allele?
c. dominant autosomal allele?
d. recessive X-linked allele?
e. recessive autosomal allele?