TABLE III
Spontaneous and Experimental Modifications of the Cytogenetic Mode of Reproduction and Development
A
B
C
D
E
F
^ \ ^
Somatic numbers of
^ x ^ c h r o m o s o m e sets
^ ^ ( p l o i d y )
Cytogenetic"^.
mode of
^ \ ^ ^
reproduction
^ ^
Normal fertilization;
amphimixis
Double fertilization
Experimental gynogenesis
(after insemination by
i r r a d i a t e d s p e r m or by
means of centrifugation
or heat shock of freshly
inseminated egg)
Experimental androgenesis
Meiotic natural and
artificial parthenogenesis
of 2 n,3 n, 4 n, and 6 n
oocytes with or without
subsequent automictic
fusion of reduced
cleavage nuclei
Ameiotic parthenogenesis of
2 n, 3 n, 4 n, and 6 n oocytes
1
I n
~
+ -
(VI, A)
j —
(VI, B)
+ -
( I I L A . l )
-
2
2n
+ +
(Π)
+ +
(vi, c,i)
(VI, A)
(VI, B)
+ +
(III. A, 1.2)
(III, C, 2)
3
3 n
+ +
(V,D)
+ +
a
+ +
( V , E )
4
4 n
+ +
(V, F , G )
+ + °
+ +
(III, A, 2)
+ +
( V , B )
5
5 71
-
-
6
6 n
+ + °
-
7
Mixoploids
ln/2n,
2w/4w,
3 n/6 n, and more
complex ones
+ +
a
4- +
(ΠΙ,Α,Ι)
+ -r
( V , B , F )
8
Mosaics and
gynandromorphs
+ +
(VI, C, 2)
+ +
(VI, C, 1)
+ + a
(VI, C, 2)
9
Aneuploids
4-4(V,D)
+ -
(V,D)
α More or less rare cases described in several papers and/or obtained in some of the author's experiments, which are not discussed in the present review.
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