DNA Fingerprint Analysis

UPDATED

Scan the DNA of frogs to produce DNA fingerprints. Use the DNA fingerprints to identify possible identical twins and to determine which sections of DNA code for the skin color, eye color, and presence or absence of spots.

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Assessment Questions (5):

  1. Shown below are the DNA scans for three frogs that look alike. Which frogs are identical twins?

    gizmo screenshot
  2. Shown below are the DNA scans for Frog W, Frog X, Frog Y, and Frog Z. Bands 2–4 control the presence of spots. If Frog Z does NOT have spots, which frogs DO have spots?

    Screenshot
  3. Frog T has escaped from a pet shop! Luckily, you were able to obtain a DNA sample from the shop. Shown below are Frogs Q, R, and S, and also the DNA scans for Frogs Q, R, S, and T. If bands 7–9 control eye color, what is the eye color of Frog T?

    Screenshot

    Screenshot
  4. Suppose that frogs can have either high blood pressure or low blood pressure, and this is controlled by bands 10–12. The DNA scan shown below is from a frog that has low blood pressure. Which DNA scan below was also obtained from a frog with low blood pressure?

    Screenshot

    Four DNA scans
  5. The DNA scans of three frogs are shown below. The highlighted bands determine the skin color, eye color, and whether the frogs have spots or not. Which codon determines skin color?

    Frogs and scans

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