Gregor%20Mendel

1
(No Transcript)
2
Johann Mendel
was born in 1822 in Heinzendorf, Austria, to a
peasant farming family.
Austria
Poland
Italy
Germany
Czech Republic
Austria
3
During his early years,
Do I LOOK like a farmer?
Johann did NOT like agriculture very much.
He lay around in his bed sick for weeks,
possibly to avoid farm chores.
4
When Johann was 16,
his father had a debilitating farming accident
and Johann was forced to provide for himself.
5
When Johann was 18,
he borrowed money from his younger sisters dowry
to pay for his education at the university for
two years.
6
When he was 21, one of Johanns teachers took
note of his exceptionally bright mind and
persuaded him to join the Augustinian monks.
St.Thomas Church, (now Brno,
Czechoslovakia)
7
After he arrived at St. Thomas, Johann Mendel
changed his name to Brother Gregory.
The monastery was a center of learning for young
men who wanted to study theology and natural
science.
8
Brother Gregory also spent time teaching
mathematics at a nearby school.
After one year, in order to become a teacher, he
took the teachers examinations at the University
of Vienna
. . . and failed.
9
During his early years at the monastery, Mendel
began studying and breeding mice.
The bishop was not pleased.
10
Brother Gregor settled on bees . . .
11
and peas.
12
University of Vienna
While at the monastery, Gregor continued his
studies at the University of Vienna for several
years.
He became a reserve teacher for an ailing
professor, teaching science at a local college
while studying physics at the University of
Vienna.
13
After many years at the university, Gregor retook
the teachers exam,
and failed for the second time.
14
In spite of these failures, Mendel continued to
conduct numerous experiments on plants.
Mendel narrowed his focus to one particular
garden pea, Pisum sativm.
For 8 years, Mendel experimented with over 28,000
peas in the large gardens attached to the
monastery.
15
Rather than study every characteristic of the
garden pea, Mendel narrowed his observations to 7
traits.
16
Garden Pea Traits Observed
17
Seed shape
smooth wrinkled
yellow green
Seed color
inflated constricted
Pod shape
green yellow
Pod color
Flower color
purple white
Flower location
axial terminal
tall short
Plant size
18
In 1866 when Mendel was 44, his experimental
results were published
. . . and ignored long after he died.
19
In 1900, 3 scientists - Carl Correns,
Hugo de Vries, and Erich von Tschermak -
all independently rediscovered and verified
Mendel's principles, marking the beginning of
modern genetics.
He is now considered the father of genetics.
20
Bibliography
Hall, Mandy. (1911). Johann Gregor Mendel.
Psychology History. Available. Online
http//www.muskingum.edu/psychology/psyweb/histor
y/mendel.htm
Windle, B.C.A. (1911). Mendel, Mendelism. The
Catholic Encyclopedia, Vol X. Robert Appleton
Company. Available. Online http//www.newad
vent.org/cathen/10180b.htm