41. Some workers do; they lay unfertilized eggs that can develop into males, known as drones. 42. She responds, " Nooo . uses an unfertilized egg and a skin cell ." 43. Caviar can be obtained only by killing the female sturgeon while she is carrying the unfertilized eggs. 44. Next, they will create defects in unfertilized eggs, hoping to measure them with the probe. 45. Unfertilized eggs hatch out with females only, while fertilized ones may be either male or female.46. As demonstrated in unfertilized vertebrate oocytes, cortical granule exocytosis is induced when calcium is artificially increased. 47. All egg-laying animals initially produce unfertilized eggs in the hope that they will be fertilized. 48. They also took unfertilized sheep eggs and removed the nucleus, the control room that contains the genes. 49. Cloning involves taking DNA from a cell of an adult animal and putting it into an unfertilized egg. 50. Researchers have harvested stem cells from unfertilized mouse and monkey eggs that were coaxed to grow through parthenogenesis.