Gregor Mendel (1840s)

Pea Plants are great genetic model organism

Genes

Locus

Chromosome

Alleles

Diploid

Haploid

True-Breeding Lineage

True breeding

Hybrid offspring

Homozygous dominant

Homozygous recessive

Genotype

Phenotype

Homozygous

Heterozygous

Terms used for tracking the inheritance of traits through generations of offspring

Monohybrid

Dihybrid

Mendel's theories

Theory of segregation

Theory of independent assortment

Probability

Probability and Punnett squares

–What are five factors that can influence patterns of heredity?

Incomplete Dominance

Codominance

Multiple Alleles

Continuous Variation

Environmental Influences

How blood types are inherited and expressed:

Pleiotropy

Epistasis


Hair color in mammals

Comb shape in poultry

Hair color in Labrador Retrievers
(epistasis)

Continuous variation

Continuous variation
(normal distribution)

-Examples of environmental effects on phenotypes

Hydrangea