1. What is an SNP (single nucleotide polymorphism)?

  2. What is bioinformatics?

    Think Critically
  1. Draw Conclusions Scientists have searched the human genome database to find possible promoter sequences. What is likely to be found near a promoter sequence?

  2. Infer Why does DNA move toward the positive end of the gel during gel electrophoresis?

  3. Observe The table below shows the DNA sequences that are recognized by five different restriction enzymes and the locations where those enzymes cut. Which enzymes produce DNA fragments with “sticky ends”? What is the common feature of the sequences cut by these enzymes?

Table titled 'DNA Sequences Cut by Enzymes' shows the data of 'Enzyme' and 'Recognition Sequence'.dd

Connecting Concepts

Use Science Graphics

Use the data table to answer questions 27 and 28.

Table titled 'Chromosomes and Phenotypes.'d

  1. Interpret Tables What differs in the sex-determining mechanism of the two organisms?

  2. 28. Draw Conclusions What can you logically conclude about the genes on the sex chromosomes of fruit flies and humans?

Write About Science

  1. Explanation Write a paragraph that tells how colorblindness is inherited. Describe the condition and explain why it is much more common in males. (Hint: Begin your paragraph with a topic sentence that expresses the paragraph's main idea.)

  2. Assess the Explain the relationship between meiosis and Down syndrome, Turner's syndrome, and Klinefelter's syndrome.


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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