Genetics & Heredity Progression 2

Different versions of genes.

• Allele

• Dominant Allele

• Recessive Allele

• Trait

Determines a trait regardless of what other alleles an individual has.

• Allele

• Dominant Allele

• Recessive Allele

• Trait

Only determines a trait if it is homozygous.

• Allele

• Dominant Allele

• Recessive Allele

• Trait

A distinct variant of a single, observable characteristic.

• Allele

• Dominant Allele

• Recessive Allele

• Trait

The occurrence of an organism, trait, or gene in more than one form.

• Variation

• Codominance

• Crossing Over

• Incomplete Dominance

A form of interaction of alleles in which both alleles are equally expressed in a heterozygous individual.

• Variation

• Codominance

• Crossing Over

• Incomplete Dominance

A form of interaction of alleles in which neither allele is dominant, resulting in a phenotype that is an intermediate between the two homozygous phenotypes.

• Variation

• Codominance

• Crossing Over

• Incomplete Dominance

The exchange of alleles between homologous chromosomes during meiosis.

• Variation

• Codominance

• Crossing Over

• Incomplete Dominance

Genotype

• The genetic makeup of an individual, including the exact versions of each gene they carry.

• The combined traits possessed by an individual.

• An individual possesses two different alleles for a gene.

• An individual receives two identical alleles from each parent.

Homozygous

• The genetic makeup of an individual, including the exact versions of each gene they carry.

• The combined traits possessed by an individual.

• An individual possesses two different alleles for a gene.

• An individual receives two identical alleles from each parent.