Match samples with a DNA fingerprint

Grade 9 Science Worksheet

Circle the best answer.

1. Read this first

   Use this

   Model gel (not to scale; model data).

3. 1.

   Using the apple gel, Tree 2 differs from Variety R at one band. Which band, by Bo's reading?

   • Its 950 bp band
   • Its 550 bp band, where Variety R has 600 bp
   • Its 400 bp band
   • No band; it is a full match with the Variety R lane
4. 2.

   Using the apple gel, how many trees can be ruled out as Variety R, by Jun's reading?

   Use the picture in question 1.

   • 3 trees
   • 0 trees; each one shares bands
   • 1 tree: just Tree 3
   • 2 trees: Tree 2 and Tree 3
6. 3.

   Using the dog gel, where did the puppy's 900 bp band come from, by Kira's reading?

   • Male Y
   • Neither parent; it is new
   • The mother
   • Male X
7. 4.

   Using the dog gel, which of the puppy's bands are not in the mother's lane, by Luz's reading?

   Use the picture in question 3.

   • 900 bp and 150 bp
   • 750 bp and 300 bp
   • Zero; each one matches the mother
   • 600 bp and 400 bp
8. 5.

   Using the dog gel, which male could be the puppy's father, by Milo's reading?

   Use the picture in question 3.

   • Either male, since puppies match the mother
   • Male Y, since it shares no bands with the mother
   • Male X, which has the 750 bp and 300 bp bands
   • Neither male

9. Use this

   Model gel (not to scale; model data).

11. 6.

    Using the cow gel, why can Bull Q be ruled out as the calf's father, by Noah's reading?

    • The calf must match its mother alone
    • Bull Q shares the 650 bp band, so it must be the father
    • Bull Q has more bands than the calf
    • The calf's 300 bp band is in neither the mother's nor Bull Q's lane
12. 7.

    Using the cow gel, which of the calf's bands came from its mother, by Pia's reading?

    Use the picture in question 6.

    • 1000 bp and 500 bp
    • 700 bp and 200 bp
    • 650 bp and 300 bp
    • Each of the four bands
13. 8.

    Using the dog gel, which lane has its smallest band nearest the bottom, by Tala's reading?

    • The mother's and the puppy's, at 150 bp
    • Male Y's, at 850 bp
    • Male X's, at 200 bp
    • Male X's, at 750 bp

14. Use this

    Model gel (not to scale; model data).

16. 9.

    Using the cow gel, between which ladder bands does Bull P's 550 bp band sit, by Zee's reading?

    • Below the 100 bp band
    • Between 300 bp and 100 bp
    • Between 1200 bp and 600 bp
    • Between 600 bp and 300 bp
17. 10.

    Using the cow gel, which band in the four sample lanes is largest, by Ari's reading?

    Use the picture in question 9.

    • The 100 bp band, farthest down
    • The 1200 bp band, from the ladder
    • The 1000 bp band, nearest the wells
    • The 300 bp band, in the middle