134
Μ. J. D. WHITE
occurred in certain species of Moraba and Warramunga
(Australian
grasshoppers of the family Eumastacidae) and the tettigoniid Yorkiella
picta (White, unpublished data); they are also known in a number of
species of beetles (Smith, 1950, 1952a,b, 1953). The situation in
^Autosome
plus
(lost)
(I) XO —> X Y
^^^^^^some
^^^^^^^
P'<»
(lost)
FIG. 2
Four types of whole-arm translocations which change the nature of the sex
chromosome mechanism. Chromosome regions included in the differential segment
of the original X shown with a wavy outline; differential segment of the Y shown
with a "fringed" outline. Br, positions of the various breaks responsible for the
translocations. Further explanation in text.
Μ. J. D. WHITE
occurred in certain species of Moraba and Warramunga
(Australian
grasshoppers of the family Eumastacidae) and the tettigoniid Yorkiella
picta (White, unpublished data); they are also known in a number of
species of beetles (Smith, 1950, 1952a,b, 1953). The situation in
^Autosome
plus
(lost)
(I) XO —> X Y
^^^^^^some
^^^^^^^
P'<»
(lost)
FIG. 2
Four types of whole-arm translocations which change the nature of the sex
chromosome mechanism. Chromosome regions included in the differential segment
of the original X shown with a wavy outline; differential segment of the Y shown
with a "fringed" outline. Br, positions of the various breaks responsible for the
translocations. Further explanation in text.