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DTSTART:20180325T030000
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DTSTART:20171029T020000
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BEGIN:VEVENT
DTSTAMP:20260427T194954Z
UID:59ad2a0ad1b39199485515@ist.ac.at
DTSTART:20171108T123000
DTEND:20171108T133000
DESCRIPTION:Speaker: Daniel Jeffries\nhosted by Beatriz Vicoso\nAbstract: U
 nderstanding the mechanisms by which sex chromosomes evolve has been a lon
 gstanding goal for evolutionary biologists. In contrast to many model spec
 ies\, including mammals\, birds and flies\, cold blooded vertebrates and p
 articularly frogs show high levels of homomorphy between their sex chromos
 omes (X vs. Y or Z vs. W). One process which might explain this homomorphy
  is sex chromosome turnover\, the swapping of the pair of chromosomes used
  for sex determination. Using RADseq of over 20 species we show that turno
 vers are extremely frequent in frogs and likely play an important role in 
 maintaining sex chromosome homomorphy in these species. Further\, of the 1
 3 chromosomes present in most Ranid frogs\, only a few are commonly used f
 or sex determination\, implying that they harbour genes which predispose t
 hem for the role of sex-determiner. Our ongoing work asks why frogs switch
  their sex chromosomes so often compared to other taxa\, and by what mecha
 nism these turnovers occur.
LOCATION:I22 Lakeside View (I22.01)\, ISTA
ORGANIZER:cfraisse@ist.ac.at
SUMMARY:Daniel Jeffries: Towards the understanding of sex chromosome evolut
 ion in frogs
URL:https://talks-calendar.ista.ac.at/events/896
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