|
So Mendel observed that
in the F1
|
|
generation all seeds
had a yellow
|
|
colour.
|
|
|
|
x
|
|
--»
|
|
|
P1
|
|
P2
|
|
F1
|
|
Yellow
|
|
green
|
|
all Yellow
|
|
|
|
Than he crossed these
yellow
|
|
coloured seeds of the F1
generation
|
|
and he observed that
not all seeds
|
|
of the F2
generation had a yellow
|
|
colour, but that some
seeds had
|
|
again a green colour.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
x
|
|
--»
|
|
|
F1
|
|
F1
|
|
|
|
|
|
|
|
|
|
|
|
|
|
F2
|
|
|
|
Apparently the
recessive
|
|
characteristic was not
lost in the F1
|
|
generation at all which
meant that
|
|
there is thus indeed strong
|
|
evidence for the presence of
|
|
discrete units of
heredity that occur
|
|
in pairs.
|
|
|
