Heredity Review

Genetics Mendel’s discoveries formed the foundation of ___________, the scientific study of heredity.

Dominant A ___________ allele is one whose trait always shows up in the organism when the allele is present.

Each different form of a physical characteristic is a _______. Trait Each different form of a physical characteristic is a _______.

A ______ is the unit of genetic material that controls a trait.

Homozygous An organism that has two identical alleles for a trait is _____________ .

An organism’s __________ is its genetic makeup, or allele combination. Genotype An organism’s __________ is its genetic makeup, or allele combination.

Recessive A ___________ allele is hidden whenever the opposite allele is present.

Phenotype An organism’s __________ is its physical appearance, or visible traits.

Heterozygous An organism that has two different alleles for a trait is _____________ .

Heredity ___________ is the passing of physical characteristics from parents to offspring.

_________ are the different forms of a gene. Alleles _________ are the different forms of a gene.