The study of heredity.

Segment of DNA, on a chromosome, that controls a trait.

The passing of genetic traits from parent to offspring.

The genetic combination of alleles in an organism.

An allele whose trait will always show up in an organism, if it is present.

An allele whose trait is hidden when a dominant allele is present.

Heterozygous is the same as....

An organism that has one dominant and one recessive allele for a trait.

An organism that has 2 of the same alleles for a trait.

Purebred for a trait

Different forms of the same gene that controls a trait. ________ are represented by upper and lower case letters.

The "Father of Genetics" is....

Gregor crossed 2 ___________ to study genetics.