Today’s Objectives:
SOL BIO.2e,
BIO.6d-BIO.6g
Given a description of Mendel’s work
with garden peas, explain and/or
identify Mendel’s principles (dominance,
segregation, independent assortment,
or the processes involved).
Identify the following: recessive,
genetics, gene, genotype, phenotype,
heredity, heterozygus, homozygous.
Gregor Mendel (1823-1884)
Augustinian monk
Mendel was the first
person to trace the
characteristics of
successive generations of
a living thing (pea plants).
Mendel’s Laws of Heredity
Hereditary factors do not combine, but are
passed intact (Law of Segregation)
Each member of the parental generation
transmits only half of its hereditary factors to
each offspring (with certain factors "dominant"
over others) (Law of Dominance)
Different offspring of the same parents
receive different sets of hereditary factors
(Law of Independent Assortment)
Why Peas?
Quick
reproductive cycle
Self-pollinating
He studied simple traits, traits that
occurred in only one of two
possible variations.
Definitions
Trait
Genetics
Gene
Hybrid
Allele
Phenotype
Dominant
Genotype
Recessive
Homozygous
Heredity
Heterozygous