Match samples with a DNA fingerprint
Grade 9 Science Worksheet - Challenge Me
Circle the best answer.
A student says the puppy's pattern should match its mother's exactly. Which reply fits OpenStax, by Jun's reading?
- No; it inherits from both parents, so some bands come from the father
- No; it should match the father's pattern exactly
- Correct; a puppy inherits the whole of its DNA from its mother's side of the family
- Correct; the father's DNA doesn't show up on the gel
A new male, Z, has bands at 750, 450, 300 and 100 bp. Could Z be the puppy's father, by Luz's reading?
Use the picture in question 1.
- No; Z shares no bands with the mother
- Yes; Z has four bands, like the puppy
- No; Z's 450 bp band is not in the puppy, so Z cannot be its father
- Yes; Z has both of the puppy's bands that the mother lacks
Model gel (not to scale; model data). A second calf has bands at 1000, 800, 500 and 250 bp. Which bull could be its father, by Milo's reading?
- Bull Q
- Both bulls
- Neither bull
- Bull P
In the dog gel, Male Y shares no bands with the puppy. What does that show, by Noah's reading?
- Male Y must be the father, since parents differ
- Male Y can be ruled out as the father
- Male Y is the puppy's mother
- Nothing; bands do not come from parents
Read this first
Use this
Model gel (not to scale; model data). Wells at the top, next to the negative (-) end. The positive (+) end is at the bottom. Ladder lane, top to bottom: 1000, 500, 250, 100 bp. Seed packet sample, bands: 800, 450, 300 bp. Plant A, bands: 800, 450, 300 bp. Plant B, bands: 700, 450, 250 bp. Plant C, bands: 800, 350, 300 bp.
Which evidence best shows that Plant A came from the seed packet's line, by Pia's reading?
- Plant A's bands run farther than Plant B's
- Each of Plant A's bands lines up with the sample's
- Plant A's tomatoes are the same color
- Plant A shares its 450 bp band with Plant B and with the seed packet
Use this
Model gel (not to scale; model data).
Which evidence best rules out Tree 3 as Variety R, by Ren's reading?
- It shares the 600 bp band with Variety R
- It has the same number of bands as Variety R, three in each lane
- Its leaves are a different shape
- Its 900 bp and 350 bp bands are not in Variety R's lane
A lab runs the calf twice and gets the same bands both times. Why does that help, by Tala's reading?
- It shows the calf has two fathers
- It shows big pieces run farther
- It shows the calf's genes for color
- It shows the band pattern can be trusted
Use this
Model gel (not to scale; model data). Wells at the top, next to the negative (-) end. The positive (+) end is at the bottom. Ladder lane, top to bottom: 1000, 500, 250, 100 bp. Seed packet sample, bands: 800, 450, 300 bp. Plant A, bands: 800, 450, 300 bp. Plant B, bands: 700, 450, 250 bp. Plant C, bands: 800, 350, 300 bp.
Which summary of reading a DNA fingerprint fits OpenStax, by Zee's reading?
- Cut DNA sorts by gene; samples match when they share a trait
- Uncut DNA sorts by color; samples match when the lanes look alike
- Cut DNA sorts by size, smallest farthest; samples match when every band lines up
- Cut DNA sorts by size, largest farthest; samples match when most of their bands line up
Which summary of a parent and offspring check fits, by Ari's reading?
- An offspring shares no bands with its parents
- Each offspring band must appear in one parent or the other
- Each offspring band must appear in the mother's lane
- The offspring must match one parent's pattern exactly
Model gel (not to scale; model data). Which summary of what the bands are fits OpenStax, by Bo's reading?
- Pieces of different lengths, from repeats that vary between individuals
- Genes for traits such as horn shape and coat color
- Proteins, sorted by their charge
- Whole chromosomes, one per band
