Homozygous and Phenotype Identification

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What is a genotype?

Back

A genotype is the genetic constitution of an individual, specifically the alleles present at a particular gene locus.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, either dominant (e.g., AA) or recessive (e.g., aa).

Front

What does heterozygous mean?

Back

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

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even when only one copy is present (e.g., A), while recessive alleles only express their trait when two copies are present (e.g., aa).

Front

Identify the phenotype for the genotype 'AA'.

Back

The phenotype for the genotype 'AA' would typically express the dominant trait.

Front

Identify the phenotype for the genotype 'aa'.

Back

The phenotype for the genotype 'aa' would typically express the recessive trait.

Front

What is an example of a homozygous dominant genotype?

Back

An example of a homozygous dominant genotype is 'AA'.

Front

What is an example of a homozygous recessive genotype?

Back

An example of a homozygous recessive genotype is 'rr'.

Front

If an organism has blue eyes, what is this an example of?

Back

This is an example of a phenotype.