Genetics Vocabulary: Dominant and Recessive

Genetics Vocabulary: Dominant and Recessive

Read each question carefully and provide your best answer. This worksheet will test your understanding of key genetics vocabulary.

Use the words below to complete the sentences.

1. A specific version of a gene is called an  .

2. An organism's observable characteristics are its  .

3. An allele that masks the expression of another allele is considered  .

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

5. An individual with two identical alleles for a particular gene is  .

6. An allele that is only expressed when two copies are present is  .

7. Which of the following describes an organism with two different alleles for a trait?

8. If 'B' represents the dominant allele for brown eyes and 'b' represents the recessive allele for blue eyes, what is the phenotype of an individual with the genotype 'Bb'?

9. A recessive allele will always be expressed in the phenotype.

10. An organism's genotype directly determines its phenotype.

11. Explain the difference between a dominant allele and a recessive allele. Provide an example.

12. Describe the relationship between genes, alleles, genotypes, and phenotypes.