41. Many years of crossbreeding have proven that each successive generation of hybrids is better. 42. They can spend hundreds of dollars on new varieties, and dabble in crossbreeding and hybridizing. 43. The hope is that crossbreeding these animals will result in a creature that approximates the quagga. 44. Farmers, food processors and environmental groups alike say accidental crossbreeding in Brazil is virtually inevitable. 45. The genetic richness of " Testudo graeca " is also shown in their crossbreeding . 46. Similar to other longwool breeds, the Cotswold was often used for crossbreeding in early times. 47. Today's grapefruit is the result of the crossbreeding of a pomelo and a sweet orange. 48. After that crossbreeding , a population of steppe bison crossed the Bering Land Bridge to North America. 49. One type of sympatric speciation involves crossbreeding of two related species to produce a new hybrid species. 50. Due to crossbreeding between the different types, this distinction vanished, resulting in a single type.
