Month: September 2022

HYPOTHESIS 1. “It may be to increase the efficiency of mate recognition and fusion.” http://www.sciencedirect.com/science/article/pii/S1749461315000391 View in LinkedIn

HYPOTHESIS 2. “It may serve to restrict outbreeding compared to populations or species in which there is one universal mating type that can mate with anyone.” http://www.sciencedirect.com/science/article/pii/S1749461315000391 View in LinkedIn

HYPOTHESIS 3. “Having two sexes may be also to restrict inbreeding compared to one universal mater that can mate with itself as well as with anyone else.” http://www.sciencedirect.com/science/article/pii/S1749461315000391 View in LinkedIn

HYPOTHESIS 4. “Having two mating types or sexes may have evolved as a response to conflicts between nuclear and mitochondrial genomes, or between mitochondrial genomes, and thereby given rise to uniparental inheritance of mitochondria and chloroplasts.” http://www.sciencedirect.com/science/article/pii/S1749461315000391 View in LinkedIn

HYPOTHESIS 5. “Having two defined mating types or sexes may have enabled specialization of gametes and differential contribution of resources, giving rise to certain development outcomes that we observe such as the transition from isogametic species to anisogametic ones.” http://www.sciencedirect.com/science/article/pii/S1749461315000391 View in LinkedIn

HYPOTHESIS 6. “Two sexes might have served to enable the development of sex specific and sex antagonistic traits.” http://www.sciencedirect.com/science/article/pii/S1749461315000391 View in LinkedIn

HYPOTHESIS 7. “Finally, having two mating types or sexes may serve to enable organisms to know when they are diploid, as they will be heterozygous rather than homozygous for sex determinants contributed by each haploid parent.” http://www.sciencedirect.com/science/article/pii/S1749461315000391 View in LinkedIn

LEADING IDEAS. “Two major hypotheses have been proposed to explain the evolution of separate sexes. The first hypothesis is that there are trade-offs between male and female function, such as when mating displays enhance male fitness but decrease female fitness. In this case, individuals can gain reproductive advantages by specializing as a male or female.” http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1001899 View in LinkedIn