15 Assessment

15.1 Selective Breeding

Understand Key Concepts

  1. Crossing dissimilar individuals to bring together their best characteristics is called

    1. domestication.

    2. inbreeding.

    3. hybridization.

    4. polyploidy.

  2. Crossing individuals with similar characteristics so that those characteristics will appear in their offspring is called

    1. inbreeding.

    2. hybridization.

    3. recombination.

    4. polyploidy.

  3. Taking advantage of naturally occurring variations in organisms to pass wanted traits on to future generations is called

    1. selective breeding.

    2. inbreeding.

    3. hybridization.

    4. mutation.

  4. How do breeders produce genetic variations that are not found in nature?

  5. What is polyploidy? When is this condition useful?

  6. Think Critically
    1. Propose a Solution Suppose a plant breeder has a thornless rose bush with scentless pink flowers, a thorny rose bush with sweet-smelling yellow flowers, and a thorny rose bush with scentless purple flowers. How might this breeder develop a pure variety of thornless, sweet-smelling purple roses?

    2. Compare and Contrast Hybridization and inbreeding are important methods used in selective breeding. How are the methods similar? How are they different?

15.2 Recombinant DNA

Understand Key Concepts

  1. Organisms that contain genes from other organisms are called

    1. transgenic.

    2. mutagenic.

    3. donors.

    4. clones.

  2. What process is shown below?

    1. cloning

    2. transformation

    3. hybridization

    4. polymerase chain reaction

      Process flow diagram.d

  3. When cell transformation is successful, the recombinant DNA

    1. undergoes mutation.

    2. is treated with antibiotics.

    3. becomes part of the transformed cell's genome.

    4. becomes a nucleus.

  4. Bacteria often contain small circular molecules of DNA known as

    1. clones.

    2. chromosomes.

    3. plasmids.

    4. hybrids.

  5. A member of a population of genetically identical cells produced from a single cell is a

    1. clone.

    2. plasmid.

    3. mutant.

    4. sequence.

  6. Describe what happens during a polymerase chain reaction.

  7. Explain what genetic markers are and describe how scientists use them.

  8. How does a transgenic plant differ from a hybrid plant?


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Table of Contents

Miller & Levine Biology UNIT 1 The Nature of Life UNIT 2 Ecology UNIT 3 Cells UNIT 4 Genetics UNIT 5 Evolution UNIT 6 From Microorganisms to Plants UNIT 7 Animals UNIT 8 The Human Body A Visual Guide to The Diversity of Life Appendices Glossary Index Credits