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Countdown The theory of evolution. 2. Discovery of DNA. 3. The first Laws of Heredity. 4. Description of the human genome.
Countdown They are most common. 2. They cause the recessive trait to go extinct. 3. They show if one dominant allele is inherited.
Countdown They show trait A. 2. They do not show trait A. 3. Aa. 4. AA. 5. aa.
Countdown We have two biological parents. 2. DNA replicates before cell division. 3. Every gene has two alleles.
Countdown They decline in a population over time. 2. They show if two recessive alleles are inherited. 3. They cause disease.
Countdown % 2. 50% 3. 75% % 5. Impossible to predict