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Inbreeding and Hybridization

Inbreeding

Inbreeding is when the two parents have the same characteristic that you want to show up in the offspring.

A heavy father pig mated to heavy mother pig = heavy babies... and pig farmers get paid by the pound!

fast horse X fast horse = really fast horse to win races

smallest dog X smallest dog = tiny dog that will sell for more money

One concern with inbreeding is how similar the DNA of the populations will become over time. Less variety in DNA will increase the probabilities of illness and diseases in the later generations.

Farmers have been using selective breeding techniques for centuries to produce crops with variety and desirable characteristics. The five popular vegetables below are all decendents of wild mustard - the tiny plant in the middle.

Hybridization

Hybridization is a great way to get stronger, better, and more useful organisms. It's been done for thousands of years, even before we knew about genes. The negative about it is - due to probability - we don't always get the traits we wanted to in the end and have to try multiple times before we get the traits desired. That takes time.

Chicken with large breast muscles X chicken with tender meat = chickens with large, tender breast meat

cow whose mother produces good tasting milk X cow that produces lots of milk = cows that produce lots of good tasting milk.

Hybridization is the process of crossing two organisms with different traits that you would like to show up in the offspring.

disease resistant wheat X high yield wheat = disease resistant, high yield wheat

The parent organisms are chosen in two main ways to get offspring with the traits desired.

  • inbreeding
  • hybridization
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