31. These studies helped illuminate the genetic changes that take place during the origin of species. 32. That way, they might identify some of the major genetic changes that cause breast cancer. 33. Often, the multiple genetic changes that result in cancer may take many years to accumulate. 34. The grant enabled the purchase of equipment to analyse genetic changes in different tumour biopsies. 35. With added genetic changes , they become invasive colon cancers. 36. Therefore, it appears this genetic change is usually required for the development of the disease. 37. If that genetic change is true, younger lobsters may be laying eggs before they are caught. 38. A close examination of the genetic changes in the animals suggested one possible cost of adaptation. 39. But he considers it more likely that there has been a genetic change in the beetle. 40. Scientists assume that the rate of genetic change a species undergoes is relatively constant over time.
