Mendelian Genetics Review

Front

Genotype

Back

The genetic makeup of an organism, represented by letters (e.g., Rr, HH).

Front

Phenotype

Back

The observable physical or biochemical characteristics of an organism, determined by both genotype and environment.

Front

Alleles

Back

Different forms of a gene that can exist at a specific locus on a chromosome.

Front

Genes

Back

Sections of DNA on a chromosome that code for a specific protein or trait.

Front

Genetics

Back

The field of science that studies how traits are passed on, or inherited.

Front

Heterozygous

Back

An individual with two different alleles for a specific gene (e.g., Hh).

Front

Homozygous

Back

An individual with two identical alleles for a specific gene (e.g., HH or hh).

Front

Dominant Trait

Back

A trait that is expressed in the phenotype even when only one copy of the allele is present.

Front

Recessive Trait

Back

A trait that is only expressed in the phenotype when two copies of the allele are present.

Front

Punnett Square

Back

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