Genetics Review

Front

What is the definition of 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 the definition of 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 homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., TT or tt).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Tt).

Front

What is a genotype?

Back

A genotype is the genetic makeup of an individual, represented by the alleles they possess.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygous individual are fully expressed, resulting in a phenotype that shows both traits.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic scenario where the phenotype of a heterozygous individual is intermediate between the phenotypes of the two homozygous parents.

Front

What is the significance of the letter 'T' in genetics?

Back

In genetics, 'T' often represents a dominant allele, while 't' represents a recessive allele.