1. Heredity and Genetics

2. Heredity and Genetics

4. Heredity - the passing of traits from parent to offspring
Genetics – the study of how traits are inherited

5. Gene - one set of instructions for inherited traits; one set from each parent
Alleles - the different forms of a gene; dominant and recessive (again, one from each parent)

6. Dominant Trait
A trait that prevents another trait from
appearing.
Covers up or dominates the other trait
A capital letter represents the
dominant allele

7. Recessive Trait
A trait that does not appear when the
dominant trait is present
The trait that seems to disappear; hidden by the dominant trait
Lower case letters represent the recessive alleles

8. Genotype
The genetic make-up of an organism.
It is the combination of alleles that an organism gets from its parents. (example: Tt)
Phenotype
The way an organism looks as a result of its genotype
Physical appearance (example: blue eyes)

9. Heterozygous
Receives different genetic information for a trait from each parent. (Tt)
It is a trait that is made up of a combination of a dominant and a recessive trait.
Hetero- means different.

10. Homozygous
receives the same genetic information for a trait from each parent
It is a trait that is made of all dominant (TT) or all recessive (tt) traits.
The prefix homo means the same