Life on earth (biological concepts from the non-science major perspective) 1 When comparing the DNA

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?

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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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