Genetics Vocabulary: Dominant and Recessive

Genetics Vocabulary: Dominant and Recessive

Read each question carefully and answer to the best of your ability. Use your knowledge of genetics vocabulary to complete the tasks.

1. A   allele is a trait that will always be expressed if present.

2. A   allele is a trait that is only expressed when two copies are present.

3. The observable characteristics of an organism are called its  .

4. The genetic makeup of an organism is called its  .

5. Different forms of a gene are called  .

1. Which of the following represents a homozygous dominant genotype?

2. If an organism has one dominant allele and one recessive allele for a trait, what will be its phenotype?

1. A genotype of 'gg' would result in the expression of the dominant trait.

2. If an organism has a heterozygous genotype, its phenotype will always show the dominant trait.

1. Explain the difference between a dominant allele and a recessive allele. Provide an example for each.

2. Describe the relationship between genotype and phenotype.