Genetics Review

Front

What is a heterozygous genotype?

Back

A genotype with two different alleles for a trait, such as Aa.

Front

What is a homozygous genotype?

Back

A genotype with two identical alleles for a trait, such as HH or hh.

Front

What is an allele?

Back

A version of a gene that determines a specific trait.

Front

What does it mean if an organism is homozygous dominant?

Back

It has two dominant alleles for a trait, such as HH.

Front

What does it mean if an organism is homozygous recessive?

Back

It has two recessive alleles for a trait, such as hh.

Front

What is a phenotype?

Back

The observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by the alleles it possesses.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even if only one copy is present, while recessive alleles only express their trait if two copies are present.

Front

What is an example of a heterozygous allele combination?

Back

Aa.

Front

What is an example of a homozygous recessive allele combination?

Back

hh.