Answer:
50.
Step-by-step explanation:
The independent assortment means the segregation of one pair of trait is not dependent on the other pair of trait. These traits are present on the different chromosome.
The crossing between w+m+/wm female and wm/wm male results in the progeny as w+m/wm (non-parental progeny)-25% ,w+m+/wm (parental progeny)-25%, wm/wm (parental progeny)-25% and wm+/wm(non-parental progeny)-25%. Total 50% progeny are non parental type.
Thus, the correct answer is option (B).