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. Author manuscript; available in PMC: 2015 Apr 14.
Published in final edited form as: Adv Bot Res. 2012 Sep 25;64:185–243. doi: 10.1016/B978-0-12-391499-6.00006-2

Figure 6. The mating-type loci of Chlamydomonas and Volvox.

Figure 6

(A) The mating-type locus for both species is near the telomere of a syntenic chromosome (chromosome 6 in Chlamydomonas, linkage group I of Volvox). (B) MT+ and MT− mating haplotypes of Chlamydomonas. Rearrangements between the two haplotypes are indicated by gray shading. Locations of the sex determining genes MID and MTD1 and the sex limited gene gamete fusion gene FUS1 are shown. Also indicated are the EZY2/OTU2 regions that may be important for uniparental chloroplast inheritance (Ferris et al., 2002; Goodenough et al., 2007). (C) The Volvox male and female mating-type loci are about six times larger than Chlamydomonas MT and contain very little syntenic gene order between haplotypes. Several novel genes are shown as well as genes encoding homologs MID, MTD, and the retinoblastoma tumor suppressor homolog, MAT3. Figure adapted from (Ferris et al., 2010; Umen, 2011).