Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Chapter 21 The Importance of Hybridisation in Plant and Animal Breeding A Hybrid: is the individual resulting from parents of the same species but are genetically different. e.g. greyhounds: bitch fast X dog long legs puppies long legs and faster Hybrid tend to show Hybrid Vigour i.e. bigger and better than their parents due to the re-establishment of Heterozygosity. Continual inbredding can produce strains that have become Homozygous. E.g. aabbCCDD can introduce the dominant allele, where previously only the homozygous recessive existed. Complete: AABBccdd Examples of Important Hybrids. 1) Bedding Plants: Complete: 1 x aabbCCDD Chapter 21 Why are F1 hybrid seeds more expensive to buy than seeds from either of their parents? 2) Farm Animals (a) Sheep. The Scottish Halfbred is a hybrid from: Cheviot X Border Leicester Scottish Half Bred (improved meat yield and higher lambing rate) (b) Cattle. List some examples of traits showing hybrid vigour in cattle. List Notes on Artificial Selection and Imported Species. 2