Phenotype vs. Genotype & Homozygous vs. Heterozygous

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 its genotype and environment (e.g., red flowers, tall plants).

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 homozygous dominant genotype?

Back

A homozygous dominant genotype has two dominant alleles (e.g., TT).

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What is a homozygous recessive genotype?

Back

A homozygous recessive genotype has two recessive alleles (e.g., tt).

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What is an example of a homozygous dominant genotype?

Back

An example of a homozygous dominant genotype is GG.

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What is an example of a homozygous recessive genotype?

Back

An example of a homozygous recessive genotype is rr.

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What is an example of a heterozygous genotype?

Back

An example of a heterozygous genotype is Rr.

Front

If a flower has the genotype Tt, what is its phenotype?

Back

The phenotype could be tall if T is dominant over t.