Experimental Polyembryony in Mammals
Natural polyembryony is an extremely rare occurrence in mammals although the incidence of identical individuals is unknown in most species because generally they go unnoticed. The nine-banded armadillo (Dasypus novemcinctus) usually has monozygotic quadruplets and the eleven-banded armadillo (Dasypus hybridus) has between 7 and 12 (usually 8) identical young in each litter. Monozygotic twins also occur naturally in humans, sheep, and cattle, albeit rarely.
KeywordsPlatinum Recombination Cavitation Kelly Proge
Unable to display preview. Download preview PDF.
- Illmensee K, Hoppe PC (1981b) The potential of transplanted nuclei during mammalian differentiation. In: Sauer HW (ed) Progress in developmental biology. Fischer, Stuttgart, p 67–74Google Scholar
- Moore NW, Polge C, Rowson LEA (1969) The survival of single blastomeres of pig eggs transferred to recipient gilts. Aust J Biol Sci 22:979–982Google Scholar
- Mullen RJ, Whitten WK, Carter SC (1970) Studies on chimeric mice and half-embryos. In: Annual Report of the Jackson Laboratory. Bar Harbour, pp 67–68Google Scholar
- Smith R, McLaren A (1970) Factors affecting the time of formation of the mouse blastocoele. J Embryol Exp Morphol 41:79–92Google Scholar
- Smorag Z, Ozil J-P, Modliński JA, Wierzchos E, Babusik P, Skrzyszowska M (1985) Obtaining offspring from divided sheep embryos. Medycyna Weterynaryjna 10:627–629 (in Polish)Google Scholar
- Tarkowski AK (1959b) Experimental studies on regulation in the development of isolated blastomeres of mouse eggs. Acta Theriol 3:191–267Google Scholar
- Willadsen SM (1984) Micromanipulation of embryos of the large domestic species. In: Adams C (ed) Embryo transfer in farm animals. Cambridge University Press, Cambridge, pp 185–210Google Scholar