heterogametic sex


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Related to heterogametic sex: homogametic

heterogametic sex

[¦hed·ə·rō·gə′med·ik ′seks]
(genetics)
That sex of some species which produces two or more different kinds of gametes that differ in their sex chromosome content.
References in periodicals archive ?
Although Haldane's rule applies to asymmetrical sterility or viability between homogametic and heterogametic hybrids in most diploid species, it is not directly relevant to species with other sex determination systems simply because they lack sex chromosomes and a heterogametic sex.
This includes the chloroplast chromosome and heterogametic sex chromosomes.
This incompatibility may cause dysfunction in the heterogametic sex only, such as occurs in many birds, mammals, and insects (e.
Hybrid dysfunction in Chorthippus parallelus is restricted to the heterogametic sex and occurs in [F.
One then calculates how many of these various ways would give as strong an agreement as we see with the character of heterogametic sex.
Brookfield worries that we regard as irrelevant lineages in which neither the heterogametic sex nor the sex suffering hybrid unfitness has changed.
One of the most striking generalizations in evolutionary biology is "Haldane's rule," the observation that if only one sex is sterile or inviable in the offspring of a cross between two species, it is nearly always the heterogametic sex (Haldane, 1922).