Gene exchange between species blurs lines, as in polar and grizzly bear hybrids.
Hybrid zones show how barriers vary. Introgression can transfer adaptive alleles (e.g. high-altitude gene EPAS1 from Denisovans to Tibetans). Hybridisation can swamp rare species.
Hybrid zones can be stable or move. Hybrid vigour or inviability may occur. Hybridisation can transfer useful genes.
Remember: species can exchange some genes yet remain distinct.
Gene exchange between species blurs lines, as in polar and grizzly bear hybrids.
Hybridisation and Species Boundaries is one of the 52 topics in Taxonomy & Biodiversity. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Genetic Diversity, Invasive Species, Horizontal Transfer and the Tree of Life.
Coyote-wolf hybrids in eastern North America.
Work through the Beginner topics in Taxonomy & Biodiversity first, such as Taxonomy, Binomial Nomenclature, Taxonomic Hierarchy, then return to Hybridisation and Species Boundaries. Advanced topics assume the Intermediate vocabulary.
The closest topics to Hybridisation and Species Boundaries are Genetic Diversity, Invasive Species, Horizontal Transfer and the Tree of Life, Species Delimitation. Comparing them side by side is a good way to see how the ideas connect.
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Hybridisation and Species Boundaries. To practise the whole of Taxonomy & Biodiversity, use the Taxonomy & Biodiversity quiz.
Hybridisation and Species Boundaries: Gene exchange between species blurs lines, as in polar and grizzly bear hybrids. Genetic Diversity: Variation of alleles within a species that enables adaptation and resilience. Read both side by side and note what each one explains.
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Genetic Diversity and explain the difference aloud. Finally, take the Taxonomy & Biodiversity quiz and come back to this page for any question you miss.
Variation of alleles within a species that enables adaptation and resilience.
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🗂️ Taxonomy & BiodiversityMethods integrating morphology, genetics and ecology to decide where species boundaries lie.
🗂️ Taxonomy & Biodiversity