Genetics Vocabulary: Dominant and Recessive

Genetics Vocabulary: Dominant and Recessive

Read each question carefully and provide the best answer based on your knowledge of genetics vocabulary.

1. An allele that is always expressed when present is called a   allele.

2. An allele that is only expressed when two copies are present is called a   allele.

3. The genetic makeup of an organism, represented by letters, is its  .

4. The observable physical traits of an organism are its  .

5. An individual with two identical alleles for a trait is  .

6. If 'T' represents the dominant allele for tallness and 't' represents the recessive allele for shortness, which genotype would result in a tall phenotype?

7. An individual with the genotype 'Aa' for a given trait is considered:

8. A recessive allele will always be expressed in the phenotype, regardless of the other allele present.

9. If an organism has a genotype of 'BB', it is homozygous dominant.

10. Distinguish between genotype and phenotype using an example of a flower's color where red (R) is dominant over white (r).

11. Observe the image below of a DNA double helix. Explain how alleles, which determine traits, are represented within this structure.