1. Heredity Review

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

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

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

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

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

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

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

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

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

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

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