OF INHERITANCE
, MENDELIAN PATTERNS OF INHERITANCE
of stability from
science
genetics explains of inheritance and variations between
offspring
generation to generation
individual that
plant animal breeders knew both contribute
equally to
thought
to
sexes new
parents of appearance produce intermediate offspring blending concept of inheritance
contrasting
s
↳
between white and flowers would
give pink
cross red
↳ outliers were to be of
thought instability genetic material
Mendel (Austrian monk)
Gregor , first to
apply mathematics to
biology
↳ formed particulate theory of inheritance -
particulate because it was based on existence of
unites called called
hereditary minute particles -
now
genes
laws law of and law of independent assortment
proposed two
segregation
:
Mendel experimented on Pisum sativum
(garden pea
↳ studied simple traits that can be compared objectively (seed shape and color , flower color
↳
found that
offspring does not
get intermediate characteristics ,
but similar appearance to one parent
When species self-pollinated they became
true-breeding generations all
offspring the
-
pea , over
same as each other and parents
MENDEL'S LAW
(e
first Mendel made sure all plants were
true-breeding .
g
.
tall plants had tall
offspring
>
-
then cross pollination experiments
should
chose varieties that differed in
only one trait if
blending theory right cross
yield
-
was ,
plants with intermediate appearance
short) parents
original true-breeding (either
,
all tall or all -P
generation
first generation of
offspring F filial
generation
>
-
or
performed reciprocal dusted pollen of tall plants onto of short plants then pollen
crosses
stigmas
-
,
from plants of tall plants
short on to
stigmas