GENOTYPE- HETEROZYGOUS-HOMOZYGOUS-DOMINANT RECESSIVE

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, representing the alleles inherited from its parents.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Aa.

Front

What is a dominant allele?

Back

A dominant allele is one that expresses its trait even when only one copy is present in the genotype.

Front

What is a recessive allele?

Back

A recessive allele is one that only expresses its trait when two copies are present in the genotype.

Front

If an organism has the genotype Aa, what is it classified as?

Back

The organism is classified as heterozygous.

Front

If an organism has the genotype AA, what is it classified as?

Back

The organism is classified as homozygous dominant.

Front

If an organism has the genotype aa, what is it classified as?

Back

The organism is classified as homozygous recessive.

Front

What is the relationship between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in a heterozygous genotype.

Front

Can a recessive trait be expressed in a heterozygous genotype?

Back

No, a recessive trait can only be expressed in a homozygous recessive genotype.