Selective Breeding
lesson summary
selective Breeding Throught selective breeding ,humans choose organisms with wanted characteristics to produce the next generation.
- This take advantage of natural variation among organisms and passes wanted traits to offspring.
- The numerous breeds of dogs and varieties of crop plants and domestic animals are examples of selective breeding.
Hybridization crosses dissimilar individuals to bring together the beat of both parents in the offspring. Inbreeding is the continued breeding of individuals with selected characteristics. It ensures that wanted traits are preserved,but can also result in defects being passed on.
Increasing Variation Mutations are the source of biological diversity. Breeders introduce mutations into population to increase genetic variation. Biotechnology is the application of a technological process,invention,or method to living organisms. Selective breeding is one example of biotechnology.
- Radiation and chemicals can increase the mutation rate. Diverse bacterial strains have been bred from mutated lines.
- Drugs can prevent the separation of chromosomes during mitosis, leading to polyploidy in plants. Such plants may be larger or stronger than their diploid relatives.