Mrs. Deringer

Selective Breeding

Selective breeding is when you choose two organisms of the same species to mate for a particular purpose. Farmers have been doing this for many years. For example, let's say a farmer had a small crop of tomatoes that had a dominant allele for largeness. In this crop all her tomatoes grew extra large. By luck she also had another small crop of tomatoes with a dominant allele for redness. This crop yielded tomatoes that were very red. This farmer could then cross each plant of tomatoes to produce a crop of tomatoes that had BOTH dominant alleles. Now she would have a crop of tomatoes that grew really big and were really red. Two characteristic people look for when buying tomatoes.

Selective breeding in dogs is intentionally mating two dogs in order to produce a litter of dogs with certain desirable traits.

Look at the picture on the right. This is a picture of a Labradoodle. This dog was made by mating a Labrador Retriever and a Poodle. A dog breeder named, Wally Conron,from Australia is said to be the first to cross the Labrador Retriever and Standard Poodle. He did this for the Guide Dogs Victoria, in Australia. He was looking to make a dog that wouldn't shed that much and would have a gentle, easy to train personality.

Horses can also be produced through selective breeding.

This is an Appaloosa. This horse is bred for its distinctive coat pattern.

Race horses are often selectively bred.

Now it's your turn to create a dog breed of your own. I mixed a Beagle with a Dalmatian. Beagles are great with kids and Dalmatians are good running companions.

Use the. Create a dog link. TO HELP YOU COMPLETE THE ASSIGNMENT IN YOUR GOOGLE CLASSROOM SELECTIVE BREEDING.

CHECK YOUR COMPREHENSION:

1. A Appaloosa is an example of (selective breeding OR genetic engineering )?

2. Choosing two organisms of the same species to mate to get desirable traits from each is call (mutations OR selective breeding )?

 

 

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