Selective Breeding

Which is another term for selective breeding?

• Artificial selection
• Natural Selection
• Intelligent selection

Which activity enables humans to produce new genetic combinations in other organisms?

• selecting and breeding the organisms for specific traits

• increasing the number of enzymes available to the organisms

• growing organisms that reproduce asexually

• decreasing the amount of DNA in the diet of the organisms

Modern dogs are direct descendants of the gray wolf. They first appeared about 130,000 years ago. Today, there are about 150 different breeds of domestic dog. The great variety of modern dogs can best be explained by

• selective breeding of dogs over many years

• the cloning of domestic dogs

• genetic alterations in gray wolves alive today

• natural selection favoring wolves over dogs

Selective breeding is a technique that is used to

• give all organisms a chance to reproduce

• produce organisms from extinct species

• produce offspring with certain desirable traits

• keep farm crops free of all mutations

The arrows in the diagram below indicate the development of four different varieties of vegetable plants from wild mustard. Each of these varieties was most likely produced as a result of

• asexual reproduction in the wild for many years

• changes in light availability

• competition between plants

• selective breeding over many generations

Artificial selection is illustrated by

• random mating taking place in a population

• the appearance of a new species on an isolated island

• a gardener producing a new hybrid by cross-pollinating plants

• wind assisting the pollination of grass in a field

One problem with selective breeding is

• creating a new species

• gene variety is lost

• new food sources

What is the main characteristic of ALL selective breeding?

• Organisms with desired traits survive in the wild.

• Organisms with desired traits are chosen by humans.

• Organisms without desired traits die.

• Organisms are randomly chosen.

People capture yellow fish from a pond and breed only the most attractive individuals. This eventually results in fancy pet goldfish. This is an example of-

• Natural Selection

• Selective Breeding

Use the following table to answer the next question. A family visited a dog breeder and requested a puppy that had short fur and was friendly and lovable.  Which dogs should the breeder select to be the parents of the requested puppy?

• 1 and 2
• 2 and 3
• 1 and 4
• 2 and 4