What needs to occur to maintain the same genes in a population?
What will be an ideal response?
Answer: Random Mating
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In humans, if the SRY gene is not expressed, the unspecialized gonads develop into
A) testes. B) ovaries. C) a tumorous mass. D) gametes.
Antibodies are
a. proteins. b. steroids. c. polysaccharides. d. lipoproteins. e. any of these
The PCR method was developed by
A. Mullis. B. Sanger. C. Cohen. D. Boyer.
When comparing the sequences of a homologous gene in four different species, one pair of species shows a 1% difference, whereas the other pair shows a 3% difference. Which pair diverged longer ago from their common ancestor and why?
A. The pair with a 1% difference? a smaller difference (1% instead of 3%) indicates that there has been less time to accumulate mutations. B. The pair with a 1% difference? a smaller difference (1% instead of 3%) indicates that there has been more time to accumulate mutations. C. The pair with a 3% difference? A larger difference (3% instead of 1%) indicates that there has been less time to accumulate mutations. D. The pair with a 3% difference? a larger difference (3% instead of 1%) indicates that there has been more time to accumulate mutations.