Types of Selective Breeding Activity 2 Hybridization A
Types of Selective Breeding Activity 2
Hybridization • A special type of selective breeding • Hybridization involves crossing two individuals with different desirable traits • In the end, you get offspring with a combination of both desirable traits • Used in both animals and plants
Hybridization Example 1: Labradoodle • Look at the following dogs - crossing a Poodle and a Labrador results in a ‘Labradoodle’ • What features has the Labradoodle inherited from the Labrador? • What features has the Labradoodle inherited from the Poodle? + Poodle + Labrador Labradoodle
Labradoodle • The Labradoodle is large (like the Labrador) • Has a fluffy coat (like the Poodle) which sheds much less than a Labrador’s coat. • They are also generally well tempered and good swimmers (like both its parents breeds). • So the Labradoodle has desirable characteristics from both of its parents breeds + Poodle + Labrador Labradoodle
Hybridization Example 2: Santa Gertrudis cattle
Inbreeding • A variation of selective breeding • Inbreeding is where the offspring produced by selective breeding are mated with one another • The purpose of this type of breeding is to : – keep those desirable traits showing up in future generations • Used most often in agriculture (plants and crops)
Inbreeding Example: Broccoli and Cauliflower Both broccoli and cauliflower are products of selective breeding. As you can see, both vegetables were derived from the wild mustard plant, and each have a specific desirable trait that allows them to be unique In order for us to continue to produce and eat these two vegetables, the process of inbreeding is done. Broccoli plants made through selective breeding are mated together in order to make more broccoli plants. The same is true for cauliflower.
Finished early? Compare and Contrast • Directions: Using your notes on “The Types of Selective Breeding”, fill out the diagram in your guided notes comparing and contrasting the two types. • Think about the following questions: – What type of individuals are bred in each process? – What are the end results of each process? – What type of organisms do humans use in the process? – How are these two process similar/different?
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