| 1. |
There is always a 1 to 1 correspondence between the number guanines (G) and the number of cytosines (C) in a DNA molecule. The same is true of the relationship between adenine (A) and thymine (T). Of course professor Floop knows this. He analyzed a strand of DNA and determined the amounts of C and G it contained. If the molecule was 28% G, what was the percentage of A?
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| 2. |
If there is a two in six chance of getting a red flower when crossing a red flowered plant with a white flowered plant, how many white flowered plants would be expected in a population of 797 offspring from such a cross?
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| 3. |
If the ratio of saturated to unsaturated fatty acids in a cell membrane is 9 to 1, and there are a total of 74 billion fatty acid molecules, how many of them are saturated?
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| 4. |
If four out of every seven individuals in a population of armadillos carry a gene for a defective enzyme, how many individuals carry the normal gene in a population of 800 armadillos?
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| 5. |
In a certain desert environment there are a lot of small rodents. There also happen to be a lot of snakes that feed on the rodents. The ratio of rodents to rodent eating snakes is 13 to 4. If there are 3,200 snakes in the area, how many rodents are there?
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| 6. |
* This is a pre-made sheet.
Use the link at the top of the page for a printable page. |
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