Last Updated：2025/12/29
Sentence
The
uneven
number
discovered
in
the
four
species
mentioned
may
have
arisen
in
one
of
two
ways
:
through
bastardization,
or
through
a
mitotic
abnormality,
each
of
which
possibilities
may
now
be
considered.
In
the
case
of
bastardization
of
a
germ
cell
with
one
chromosomal
number
by
a
germ
cell
from
another
species
with
a
different
number,
the
uneven
number
eleven
might
be
secured
if
a
paternal
germ
cell
of
a
species
A,
with
the
normal
chromosomal
number
twelve,
fertilizes
a
maternal
germ
cell
of
a
species
B
with
the
normal
number
ten.
Quizzes for review
The uneven number discovered in the four species mentioned may have arisen in one of two ways : through bastardization, or through a mitotic abnormality, each of which possibilities may now be considered. In the case of bastardization of a germ cell with one chromosomal number by a germ cell from another species with a different number, the uneven number eleven might be secured if a paternal germ cell of a species A, with the normal chromosomal number twelve, fertilizes a maternal germ cell of a species B with the normal number ten.
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