1.1 Interaction of Heredity and Enviornment

Nature

Innate characteristics influenced by genetics.

Nurture

Environmental factors affecting individual development.

Genetic Predisposition

Increased likelihood of developing traits based on genes.

Evolutionary Perspective

Study how people's behaviors or mental processes have been influenced by adapations over time

Eugenics

science dealing with improving hereditary qualities

Twin Studies

Research comparing identical and fraternal twins.

Genotype

The genetic makeup of an organism.

Phenotype

Observable traits resulting from genotype and environment.

DNA

A complex molecule containing the genetic information that makes up the chromosomes.

Chromosomes

Structures containing DNA, humans have 46 total.

Recessive Gene Expression

Trait expressed only when two recessive alleles present.

Dominant Gene Expression

Trait expressed with just one dominant allele present.

Chromosomal Abnormalities

Irregularities in chromosome number or structure.

What are some Chromosomal Abnormalities?

• Down Syndrome

• Turner Syndrome

• Williams Syndrome

• PKU

Epigenetics

Study of changes in gene expression without DNA alteration.

Heritability

Measure of how much genetics influence a trait.