Chapter 5 Sexdetermination and sex-linked characteristicsPartISexdetermination
Part I Sex determination Chapter 5 Sex determination and sex-linked characteristics
Outline· Different sex determining system on chromosome·Sex determination in human· Sex determination in drosophila·Sex determination by environment·Sex-linked traits
Outline • Different sex determining system on chromosome • Sex determination in human • Sex determination in drosophila • Sex determination by environment • Sex-linked traits
Men are from Mars, Women are from VenusBezeichnungder Himmelskorper.Sonne.2Jupiter.Mond.专Saturn.CMerkur.Uranus0Venus.Neptun?.Erde.Astraa.4Mars.2Hebe.Vesta.Iris.?￥Juno.Flora.TPallas.Metis.CCeres
Men are from Mars, Women are from Venus
Chromosomal sex determining system (XY)Sex chromosome vs.AutosomeCRDanSERSCEDREACSEaaDats-BeasttCEX23u)EDXeRTerrEar34ateAEgTEr101112789SEEeEsaelGRAEECEsatc4G.13161415福Ea81A43E50ONS202219
Chromosomal sex determining system (XY) Sex chromosome vs. Autosome
Sexual differentiation is very commonSexualdifferentiation occurs inorganisms aslowas ontheevolutionary scale as bacteria and single-celled eukaryotic algaeChromosomalDNAChromosomalDNAFplasmidDPilusDonor(F+Strain)Recipient (F-)
Sexual differentiation is very common Sexual differentiation occurs in organisms as low as on the evolutionary scale as bacteria and single-celled eukaryotic algae