Some honey bee strains make a practice of removing the carcasses of larvae from their nests. This hygienic behaviour seems to be under the control of two recessive genes - uncapping the larval cells (U or u) and removing the carcass (R or r). Which of the following bees are non hygienic, but will remove pupae if cells are uncapped?
(a) UuRr
(b) uuRr
(c) Uurr
(d) uurr
