Mendelian Genetics

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses for a particular trait.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a specific gene, such as Rr.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a specific gene, such as RR or rr.

Front

What is a dominant allele?

Back

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

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

What is the phenotype?

Back

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

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the physical expression of that genetic makeup.

Front

What does it mean if an organism is a homozygous dominant?

Back

An organism is homozygous dominant if it has two dominant alleles for a trait, such as RR.

Front

What does it mean if an organism is a homozygous recessive?

Back

An organism is homozygous recessive if it has two recessive alleles for a trait, such as rr.