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Fig. 7. The Abd-B r function is required for the development of the
male genitalia. (A-D) In the male genitalia, some
Abd-BUab1 clones transform into leg tissue (A, boxed
region is amplified in B; arrows point to bracted bristles) or into antenna
(C, boxed region is amplified in D), ar, malformed arista; III, third antennal
segment. (E-G) Some Abd-BUab1 clones in the A9 of
the male disc, marked by the absence of the lacZ marker (red, E)
eliminate Abd-B expression (green, F). Merged image in G.
(H-J) Male disc bearing similar clones, marked by the absence of GFP
(green, H), eliminate Abd-B expression (I, blue), and in some cells
activate Dll (I,J, red, arrow). In some clones there is no
Abd-B expression but no Dll activation either (arrowheads,
I). (K) Drawing of a male genital disc showing the distribution of
Abd-BUab1 clones that eliminate Abd-B expression
(pink) and those that do not (green). The region where most `pink' clones
accumulate includes, mainly, the presumptive penis apparatus domain.
(L) Internal genitalia of an
Abd-BUab1/Abd-Bx23-1 female. Note the presence
of three spermathecae (s) in the highly abnormal internal genitalia. vp,
vaginal plates.
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