anatomical homology

Download Anatomical Homology

Post on 27-Jan-2016

33 views

Category:

Documents

1 download

Embed Size (px)

DESCRIPTION

Anatomical Homology. Anatomical Homolgy. Embryonic Arches. Mandibular Arch. Hyoid Arch. Otic pit. Fish. Amphibian. Reptile. Bird. Pig. Cow. Rabbit. Human. Von Baer - Comparative Embryology. Anatomical Homology/Analogy. wild-type. Antennapediamutant. Fly heads. wildtype mouse. - PowerPoint PPT Presentation

TRANSCRIPT

  • Anatomical Homology

  • Anatomical Homolgy

  • Embryonic ArchesHyoid ArchMandibular ArchOtic pit

    Mandibular Arch (ventral)Mandibular Arch (dorsal)Hyoid Arch (dorsal)SharkMeckel's cartilagePalatoquadrate cartilageHyomandibular cartilageAmphibianArticular (bone)Quadrate (bone)StapesMammalMalleusIncusStapes

  • Von Baer - Comparative Embryology

  • Anatomical Homology/Analogy

  • wild-typeAntennapediamutantFly heads

  • Hoxb-4 knockoutwildtypemouse

  • Gene/Gene Expression Homology

  • Gene/Gene Expression Homology

  • Signaling pathwaysDrosophila (invertebrate)Xenopus (vertebrate)

    dppBMP-4(dorsalization)(ventralization)

    SOGchordin(blocks dpp, ventralization)(blocks BMP-4, dorsalization)

    tolloid(TLD)xolloid(cleaves SOG, dorsalization)(cleaves chordin, ventralization)

    7152