Dominant and Recessive

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present in the genotype.

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present in the genotype.

Front

What does the term 'genotype' refer to?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses.

Front

What does the term 'phenotype' refer to?

Back

Phenotype refers to the observable characteristics or traits of an organism, which result from the interaction of its genotype with the environment.

Front

What is a hybrid genotype?

Back

A hybrid genotype consists of two different alleles for a particular gene, such as Aa.

Front

What is a purebred organism?

Back

A purebred organism has two identical alleles for a specific trait, such as AA or aa.

Front

How are dominant alleles represented in genetic notation?

Back

Dominant alleles are represented with uppercase letters.

Front

How are recessive alleles represented in genetic notation?

Back

Recessive alleles are represented with lowercase letters.

Front

What is the genotype for an organism with brown eyes if brown is dominant?

Back

The genotype could be either AA (purebred) or Aa (hybrid).

Front

If an organism has the genotype Dd, what will its phenotype be?

Back

The phenotype will be dominant because D is a dominant allele.