Dominant & Recessive Traits

Front

What is a dominant trait?

Back

A dominant trait is a characteristic that is expressed when at least one dominant allele is present in the genotype.

Front

What is a recessive trait?

Back

A recessive trait is a characteristic that is expressed only when two copies of the recessive allele are present in the genotype.

Front

Define homozygous dominant.

Back

Homozygous dominant refers to having two identical dominant alleles for a trait, represented as 'AA'.

Front

Define homozygous recessive.

Back

Homozygous recessive refers to having two identical recessive alleles for a trait, represented as 'aa'.

Front

Define heterozygous.

Back

Heterozygous refers to having one dominant and one recessive allele for a trait, represented as 'Aa'.

Front

How are recessive alleles represented in genetics?

Back

Recessive alleles are represented by lowercase letters (e.g., 'a').

Front

How are dominant alleles represented in genetics?

Back

Dominant alleles are represented by uppercase letters (e.g., 'A').

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., 'AA', 'Aa', 'aa').

Front

What is a phenotype?

Back

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

Front

What does it mean if an organism is homozygous?

Back

An organism is homozygous if it has two identical alleles for a specific trait.