Establishment of definitive polarity in the dorsoventral axis of the forelimb girdle in Amblystoma punctatum (Linn.)

✍ Scribed by Swett, F. H.

• Publisher: John Wiley and Sons
• Year: 1941
• Tongue: English
• Weight: 366 KB
• Volume: 86
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1400860105

✦ Synopsis

LIMB GIRDLE I N A3TBLYSTOMA 3'. H. SWETT D c p a r l m m i of A ? ~~t o n i ? y , Duke Univeraty School of X e d i c h c , Dzcrham, North Carolina THREE FIGURES TNTROD IJC'TlON

Earlier observations upon the establishment of definitive girdle asymmetry (Swett, '28) resulted in the conclusion that the polarity of the dorsoveiitral axis became irreversibly fixed shortly before the embryo attained stage 39. Some of those experiments were made with grafts consiclerably larger than the conventional (39 somite) limb-rudiment transplant.

Subsequent experiments upon the free limb (Hollinshead, '36 ; Swett, '37, '38), relative to the part surrounding tissue may