Introduction to Speciation exam Flashcards

The process where an ancestral species diverges into two or more species.

It defines species based on reproductive isolation.

Mechanisms that prevent the formation of a zygote.

It results in non-viable or sterile hybrids.

Speciation that occurs due to geographic isolation.

Speciation that occurs within the same geographic area.

A process that can lead to sympatric speciation by favoring extreme traits.

A condition in which an organism has extra sets of chromosomes, often leading to sympatric speciation.

Regions where different species meet and mate, producing hybrids.

Reinforcement, fusion, or stability among species.

The process where hybrids are less fit, leading to stronger reproductive barriers.

When reproductive barriers weaken, leading to the merging of species.

When hybrids continue to be produced, maintaining the hybrid zone.

Small changes in allele frequencies over a short period.

Large evolutionary changes that occur over long periods.

A diagram that represents evolutionary relationships among species.

A point where a single lineage splits into two distinct species.

On the Origin of Species.

The challenge of applying clear rules to determine species boundaries.

A key factor in defining species, preventing different species from interbreeding.

Speciation.

Author of 'On the Origin of Species' and a key figure in evolutionary biology.

They represent points where one species diverges into two.

The subjective decision-making process in determining whether populations are distinct species.

Understanding how populations split and evolve into distinct species.

Mechanisms that prevent species from interbreeding.

They illustrate the dynamic nature of species boundaries and evolutionary processes.

Another term for a phylogenetic tree, showing relationships among species.

The formation of new, distinct species.