Tetrasporic Embryo-Sac Formation in Trisomic Sectors of Maize

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Science  15 May 1964:
Vol. 144, Issue 3620, pp. 874-876
DOI: 10.1126/science.144.3620.874


Nondisjunction in mitotic divisions occurs spontaneously at a low frequency in somatic and germinal tissue in maize and results in sectors of trisomic cells. When this happens with chromosome 3 and in germinal tissue the embryo sac development is changed from the normal monosporic type to a tetrasporic type which is common in some species but not in maize.