Literature Cited

Abbadi, N., Phillippe, C., Cherry, M., Gilgenkrantz, S., Tome, F., Kaplan, J.C., Fardeau, M. 1992. Monozygotic twins discordant for Duchenne muscular dystrophy - evidence for mirror X- chromosome inactivation. Proceedings: 7th International C ongress on Twin Studies, Tokyo, Japan.

Bamforth, F., Machin, G., Innes, M. 1996. X-Chromosome inactivation is mostly random in placental tissues of female monozygotic twins and triplets. Am. J. Med. Genet. 61: 201-215

Brown, C. J. and Willard, H. F. 1994. The human X-inactivation centre is not required for maintenance of X-chromosome inactivation. Nature. 368: 154-156.

Burn, J., Povey, S., Boyd, Y., Muro, E.A., West, L., Harper, K., Thomas, D. 1986. Duchenne muscular dystrophy in one of monozygotic twin girls. J. Med. Genet. 23: 494-500

Goodship, J., Carter, J., Burn, J. 1996. X-inactivation patterns in monozygotic and dizygotic female twins. Am. J. Med. Genet. 61: 205-208

Griffiths, A. J., Miller, J. H., Suzuki, D. T., Lewontin, R. C., Gelbart, W. M. 1996. An Introduction to Genetic Analysis. W. H. Freedman and Company, New York, NY. p. 73-75.

Hall, J. G. 1996. Twins and Twinning. Am. J. Med. Genet. 61: 202-204

Jorgensen, A.L., Philip, J., Raskind, W. H., Matsushita, M., Christensen, B., Dreyer, V., Motulsky, A. G. 1992. Different Patterns of X Inactivation in MZ Twins Discordant for Red-Green Color- Vision Defiiciency. Am. J. Hum. Genet. 51: 291-2 98

Lupski, J. R., Garcia, G. A., Zoghbi, H. Y., Hoffman, E. P., Fenwick, R.G. 1991. Discordance of Muscular Dystrophy in Monozygotic Female Twins: Evidence supposting Assymmetric Splitting of the Inner Cell Mass in a Manifesting Carrier of Duchenne Dystrophy. Am. J. Med. Genet. 40: 354-364

Machin, G. A. 1996. Some Causes of Genotypic and Phenotypic Discordance in Monozygotic Twin Pairs. Am. J. Med. Genet. 61: 216-228

Migeon, B. R., Jeppesen, P., Torchia, B.S., Fu, S., Dunn, M.A., Axelman, J., Schmeckpeper, B.J., Fantes, J., Zori, R.T., Driscoll, D.J. 1996. Lack of X Inactivation Associated with Maternal X Isodisomy: Evidence for a Counting Mechanism Prior to X Inactivation during Human Embryogenesis. Am. J. Hum. Genet. 58: 161-170

Richards, C. S., Watkins, S. C., Hoffman, E. P., Schneider, N. R., Milsark, W., Katz, K. S., Cook, J. D., Kunkel, L. M., Cortada, J. M. 1990. Skewed X Inactivation in a Female MZ Twin Results in Duchenne Muscular Dystrophy. Am. J. Hum. Genet . 46: 672-681

Scheinfeld, A. 1967. Twins and Supertwins. J. B. Lippincott Company. New York, NY. p. 245-259

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Susan Hunt