10 Jun When comparing the DNA molecule to a twisted ladder Question # 00581557
Question
Life on earth (biological concepts from the non-science major perspective)
1. When comparing the DNA molecule to a twisted ladder, what do the rungs of the ladder represent?
2. Describe the three major properties of genes that are explained by the structure of DNA?
3. What occurs on the sex chromosomes to determine the sex of a mammal?
4. Describe a difference between meiosis and mitosis?
5. A black guinea pig crossed with an albino guinea pig produces 12 black offspring. When the albino is crossed with a second black one, 7 blacks and 5 albinos are obtained. What is the best explanation for this genetic situation?
6. Many bacteria may be able to respond to environmental stress by increasing the rate at which mutations occur during cell division. How might this be accomplished?
7. Describe one recent advance in biotechnology and its practical application.
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