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Sex Chromosomes in Ginkgo biloba

C. L. Lee
American Journal of Botany
Vol. 41, No. 7 (Jul., 1954), pp. 545-549
Stable URL: http://www.jstor.org/stable/2438713
Page Count: 5
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Sex Chromosomes in Ginkgo biloba
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Abstract

The staminate and ovulate trees of Ginkgo biloba possess the same number of chromosomes (2n = 24) with almost identical chromosome morphology in the two types. The only difference is that in the ovulate tree, four chromosomes of the somatic complement bear satellites, while in the staminate tree only three chromosomes show satellites. In the male plant the pair of short sub-telocentric chromosomes, only one of which bears a satellite, are believed to be the sex chromosomes. An XY type of sex determination is assumed since the heteromorphic pair of chromosomes in the male is the only feature differing from the condition in the female.

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