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1. What was Gregor Mendel’s contribution to science?

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1. The theory of evolution.

2. Discovery of DNA.

3. The first Laws of Heredity.

4. Description of the human genome.

2. Which is true about dominant traits?

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1. They are most common.

2. They cause the recessive trait to go extinct.

3. They show if one dominant allele is inherited.

3. If a person is a carrier for trait A, what would their genotype be?

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1. They show trait A.

2. They do not show trait A.

3. Aa.4. AA.5. aa.

4. Why do we have two copies of each gene?

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1. We have two biological parents.

2. DNA replicates before cell division.

3. Every gene has two alleles.

5. What is always true about recessive traits?

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1. They decline in a population over time.

2. They show if two recessive alleles are inherited.

3. They cause disease.

6. Two parents have a recessive trait. The odds of their child having the same trait are:

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1. 25%2. 50%3. 75%4. 100%5. Impossible to

predict