heterogamety


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heterogamety

 [het″er-o-gam´ĕ-te]
production of unlike gametes; said especially of the human male, who produces two types of sperm, one containing the x chromosome and the other containing the y chromosome. adj., adj heterogamet´ic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
References in periodicals archive ?
The number of fish species that present male heterogamety compared to female heterogamety is higher [12].
Yin, "Confirmation of single-locus sex determination and female heterogamety in willow based on linkage analysis," PLoS ONE, vol.
A detail to be noticed is that there was an apparent heteromorphy of pair 1 (Figure 1d), that initially led to suspect polymorphism or heterogamety. This possibility was discarded after it was noted that the presumptive heteromorphism occurred both among and within individual spreads from the same organism, and at the same frequency in both sexes.
Production of all-female and sterile coho salmon and experimental evidence for male heterogamety. Trans Am Fish Soc 111:367-372 (1982).
Studies of mating signals in birds will be instructive as to whether this discrepancy is specific to Lepidoptera or a consequence of female heterogamety.
Pacific salmon have a genotypic sex-determining system with male heterogamety; the male is XY and the female is XX (7).
This pattern would appear to corroborate the postulate of Hurst and Pomiankowski (1991) that cytoplasmic elements are responsible in cases in which hybrid breakdown is limited to males but not linked to heterogamety. Hurst and Pomiankowski (1991) argued that these cytoplasmic elements are likely to be sex-ratio distorters that cause female-biased sex ratios because their exclusive maternal transmission.
Multiple-chromosomal sex determining systems and male heterogamety have been documented for several other cypridid species including sexual populations of C.