LESSON 1 GENETICS
Definition of Genetics William Harvey
Variation treatise on reproduction and
development patterned after
differences and similarities among
Aristotle’s work
living organisms
first statement on Theory of
Raw material for adaption and
Epigenesis
evolution
Epigenesis
Heredity
organisms are derived from
transmission of traits from one
substance in egg that differentiate
generation to the next
into adult structures during
Determined by genes(elements of
embryonic development
heredity)
body organs are formed de
Is it synonymous with genealogy: novo(anew)
It considers relationships Homunculus
History: How Genetics Started sex cells that contain COMPLIETE
MINIATURE ADULT
ARCHAEOLOGICAL EVIDENCES
domestication of animals and
cultivation of plants is through
ARTIFICIAL SELECTION OF GENETIC
VARIANTS WITHIN POPULATION
PREHISTORIC TIMES
Hippocrates
Hippocratic School of Medicine
Humors on the seed are bearers of
hereditary units
can be altered before it is
transmitted to newborns
parents acquired the traits
from the environment
Aristotle Matthias Schleiden and Theodor Schwann
vital heat in a man’s semen had the Cell Theory
capacity to produce offspring all organisms are composed of cells
THE DAWN OF MODERN BIOLOGY(1600- and are derived from pre-existing
1850) cells
, LESSON 1 GENETICS
Louis Pasteur Resides in the nucleus
Each species have a characteristic
disproved spontaneous generation-
number of chromosomes
living organisms are derived from
Genes and chromosomes exist in
preexisting organism composed of
pairs
cells
genes are carried on by
chromosomes
Inherited traits are controlled by
Carolus Linnaeus
genes in chromosomes faithfully
binomial system of species transmitted through gametes
classification, embraced the theory maintaining continuity from
of fixity of species generation to the next
Charles Darwin Variation
The Origin of Species(evolutionary Any difference between cells
theory) individuals in a species or groups of
lacked an understanding of organisms of any species caused
genetic basis of variation either by: genetic differences and
and inheritance environmental factors
a. Genetic differences
Alfred Russel Wallace
genotypic variation
Natural selection differences in number and
struggle for survival structure of chromosomes
Traits are able to adapt to the or by the genes carried by
environment to survive and the chromosomes
reproduce Eye color, body form and
variation accumulate over disease resistance
long period of time ploidy levels
monoploidy and
Gregor Mendel
polyploidy
inherited variation is dependent on Variation cannot be
genetic information residing in identified as genotypic by
chromosomal genes. observation of the organism
Traits are controlled by a pair of experiments must be
genes and during gamete formation performed under
the gene pair segregate controlled
explained transmission of environment to
traits determine whether
or not the alteration
The Chromosome Theory of Inheritance
is inheritable
Chromosomes
Definition of Genetics William Harvey
Variation treatise on reproduction and
development patterned after
differences and similarities among
Aristotle’s work
living organisms
first statement on Theory of
Raw material for adaption and
Epigenesis
evolution
Epigenesis
Heredity
organisms are derived from
transmission of traits from one
substance in egg that differentiate
generation to the next
into adult structures during
Determined by genes(elements of
embryonic development
heredity)
body organs are formed de
Is it synonymous with genealogy: novo(anew)
It considers relationships Homunculus
History: How Genetics Started sex cells that contain COMPLIETE
MINIATURE ADULT
ARCHAEOLOGICAL EVIDENCES
domestication of animals and
cultivation of plants is through
ARTIFICIAL SELECTION OF GENETIC
VARIANTS WITHIN POPULATION
PREHISTORIC TIMES
Hippocrates
Hippocratic School of Medicine
Humors on the seed are bearers of
hereditary units
can be altered before it is
transmitted to newborns
parents acquired the traits
from the environment
Aristotle Matthias Schleiden and Theodor Schwann
vital heat in a man’s semen had the Cell Theory
capacity to produce offspring all organisms are composed of cells
THE DAWN OF MODERN BIOLOGY(1600- and are derived from pre-existing
1850) cells
, LESSON 1 GENETICS
Louis Pasteur Resides in the nucleus
Each species have a characteristic
disproved spontaneous generation-
number of chromosomes
living organisms are derived from
Genes and chromosomes exist in
preexisting organism composed of
pairs
cells
genes are carried on by
chromosomes
Inherited traits are controlled by
Carolus Linnaeus
genes in chromosomes faithfully
binomial system of species transmitted through gametes
classification, embraced the theory maintaining continuity from
of fixity of species generation to the next
Charles Darwin Variation
The Origin of Species(evolutionary Any difference between cells
theory) individuals in a species or groups of
lacked an understanding of organisms of any species caused
genetic basis of variation either by: genetic differences and
and inheritance environmental factors
a. Genetic differences
Alfred Russel Wallace
genotypic variation
Natural selection differences in number and
struggle for survival structure of chromosomes
Traits are able to adapt to the or by the genes carried by
environment to survive and the chromosomes
reproduce Eye color, body form and
variation accumulate over disease resistance
long period of time ploidy levels
monoploidy and
Gregor Mendel
polyploidy
inherited variation is dependent on Variation cannot be
genetic information residing in identified as genotypic by
chromosomal genes. observation of the organism
Traits are controlled by a pair of experiments must be
genes and during gamete formation performed under
the gene pair segregate controlled
explained transmission of environment to
traits determine whether
or not the alteration
The Chromosome Theory of Inheritance
is inheritable
Chromosomes
