One tactic to help bee populations stay healthy is raising hygienic bees. Hygienic bees contribute to overall disease resistance
by uncapping cells with diseased larvae and removing the diseased larvae. Uncapping (u) is a recessive trait and removal (r) is a recessive trait. A cross between a hygienic queen (uurr) and a unhygienic drone (UR) yields unhygienic bees. Remember males bees are haploid. With what could you cross the offspring to produce hygienic workers (females) in the F2 generation
For producing hygienic workers (females) in the F2 generation, the hygienic queen must be cross with hygienic drones. Due to this crossing most of the offspring produced will be hygienic due to presence of dominant allele of hygienic. Both the male and the female bees have dominant allele of hygienic so the maximum number of offspring produced will be of hygienic and very low number of offspring is produced having unhygienic allele.
