ahem; these types of male flowers {bananas} tend to be caused by stress =the type of male flowers you DO want for feminizing seeds
many times however; they are sterile flowers
IF it does drop some pollen; yes! it will affect other plants {and itself}
funny how this could be a boon {seeds!} or a curse {wah; no sinsemilla}
anyway; it would only be by re-veg'n it and testing out clones that you find if it is a trait which disqualifies your plant as a potential mother {and qualifies it as a 'father'}