Phenotype vs Genotype

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., TT, Tt, tt).

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 (e.g., flower color, height).

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 the phenotype of a plant with the genotype Tt?

Back

The phenotype can vary; it may express the dominant trait (e.g., tall) depending on the trait being studied.

Front

What is the phenotype of a plant with the genotype tt?

Back

The phenotype will express the recessive trait (e.g., short) since both alleles are recessive.

Front

What is the phenotype of a plant with the genotype GG?

Back

The phenotype will express the dominant trait associated with the G allele.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous conditions; recessive alleles only express their traits when homozygous.

Front

Give an example of a homozygous dominant genotype.

Back

An example of a homozygous dominant genotype is TT.

Front

Give an example of a homozygous recessive genotype.

Back

An example of a homozygous recessive genotype is tt.