EGG, and SPERM
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Depends on what you believe in
I would say C. eliminating government funding of research. without finding, scientists can't experiment, therefore all their research remains purely theoretical and isn't considered a discovery.
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In short, the answer is 25%.
Dave and Lisa both have genotypes of Bb. Using a Punnett square, you can calculate that their child has a 25% chance of having the genotype BB, 50% chance of having the genotype Bb, and 25% chance of having the genotype bb. Translate these to phenotypes, and their baby will have a 75% chance of having brown eyes and 25% chance of having blue eyes.