Lecture 1: Speciation 02/05/24 Flashcards
What is speciation?
The process where one species breaks into 2 or more species
What is the biological species concept?
The concept that species can interbreed and produce offsprings that are viable and fertile
What is the morphological species concept?
The concept that characterizes species by their body shape and their structures.
What is the ecological species concept?
The concept that characterizes species by how they interact with their environment such as their diet and habitat.
What is the phylogenetic species concept?
The concept that characterizes species as the smallest group that shares a common ancestor.
What is reproductive isolation?
barriers that prevent gene flow between two species
What are pre-zygotic barriers?
Barriers that occur before making the zygote.
What are forms of pre-zygotic barriers?
Habitat, temporal, behavioral, mechanical, and gametic isolation
What is habitat isolation?
Where two populations live in different habitats despite being the same species
What is temporal isolation?
When populations breed in different seasons(or time).
What is behavioral isolation?
When populations have different courtships, similar to bird mating rituals.
What is mechanical isolation?
When the reproductive parts of the species don’t align, similar to snails.
What is gametic isolation?
When the gametes of the populations don’t unite.
What are post zygotic barriers?
Barriers that occur after the zygote.
What are hybrid offspring?
The form of interspecies mating or cross between two populations.
