In addition to the predominant adult hemoglobin, HbA, which contains two a-globin chains and two b-globin chains (a2b2 ), there is a minor hemoglobin, HbA 2 , composed of two a and two d chains...

In addition to the predominant adult hemoglobin, HbA, which contains two a-globin chains and two b-globin chains (a2b2 ), there is a minor hemoglobin, HbA 2 , composed of two a and two d chains (a2d2). The b- and d-globin genes are arranged in tandem and are highly homologous. Draw the chromosomes that would result from an event of unequal crossing-over between the b and d genes.