From MicrobeWiki, the student-edited microbiology resource
Flourescence micrograph of Giardia
trophozite stained with antibiodies against tubine (green), hilighting its eight flagella, and with DAPI (blue) to visualize the DNA in the two nuclei. By Marianne Poxleitner, University of California, Berkeley. Logsdon, J.M. 2008. Evolutionary Genetics: Sex happens in Giardia. Current Biology 18: R66-R68.
File:Mating types tetrahymena.jpg
Organization of MAT locus of Tetrahymena thermophila . Six incomplete mating type genes are arranged head to head on the chromosomes with exons seperating complete mating type genes. During formation of the somatic nucleus, genomic rearrangement creates completes a full mating type gene and the others are deleted. Cervantes, M.D., E.P. Hamilton, J. Xiong, M.J. Lawson, D. Yuan, M. Hadjithomas, W. Miao, and E. Orias. 2013. Selecting One of Several Mating Types through Gene Segment Joining and Deleton in Tetrahymena thermophile. PLOS Biology.j 11(3): e1001518.