Hybridization and Speciation

Play an AI-generated podcast conversation about this lesson

What type of reproductive isolation prevents successful mating due to morphological differences?

Habitat isolation

Behavioral isolation

Hybrid breakdown

Mechanical isolation (correct)

Which type of prezygotic barrier involves different breeding times for species, preventing them from mixing their gametes?

Gametic isolation

Temporal isolation (correct)

Habitat isolation

Behavioral isolation

What is the term for the offspring of crosses between different species?

Isolates

Gametes

Viabilities

Hybrids (correct)

Which postzygotic barrier involves genes of different parent species interacting and impairing the hybrid's development or survival?

Reduced hybrid viability Signup and view all the answers

Which reproductive barrier is characterized by two species not mating due to unique courtship rituals and behaviors?

Behavioral isolation Signup and view all the answers

What is the term for the inability of hybrids to reproduce even if they are vigorous?

Reduced hybrid fertility Signup and view all the answers

What can drive sympatric speciation in cichlid fish in Lake Victoria?

Sexual selection Signup and view all the answers

What is an autopolyploid?

An individual with more than two chromosome sets derived from one species Signup and view all the answers

What is an allopolyploid?

An individual with multiple sets of chromosomes derived from different species Signup and view all the answers

What type of isolation restricts gene flow between populations in allopatric speciation?

Geographic isolation Signup and view all the answers

What results from matings between autopolyploids and diploids?

Reduced fertility Signup and view all the answers

What is a hybrid zone?

A region in which members of different species mate and produce hybrids Signup and view all the answers

What happens when some first-generation hybrids mate with another species or parent species in terms of their offspring?

Offspring of the next generation are feeble or sterile Signup and view all the answers

Which species concept cannot be applied to fossils or asexual organisms?

Biological species concept Signup and view all the answers

Which species concept defines a species by structural features?

Morphological species concept Signup and view all the answers

What does the ecological species concept emphasize about a species?

Its ecological niche Signup and view all the answers

What is speciation?

The process by which one species splits into two or more species Signup and view all the answers

How is a species defined under the phylogenetic species concept?

As the smallest group of individuals sharing a common ancestor Signup and view all the answers

How does the biological species concept define a species?

As a group of populations whose members can interbreed and produce viable, fertile offspring Signup and view all the answers

What is the relationship between microevolution and macroevolution?

Microevolution involves allele frequency changes within populations, while macroevolution considers evolutionary changes above the species level Signup and view all the answers

In which type of speciation is gene flow interrupted due to geographic isolation of subpopulations?

Allopatric speciation Signup and view all the answers

What does the gene flow contribute to in a species?

Maintains genetic diversity within populations Signup and view all the answers

Why do numerous concepts of species exist?

Due to different goals like taxonomy, understanding group formation, and evolutionary history Signup and view all the answers

What does the term 'species' mean in Latin?

Kind or appearance Signup and view all the answers

What term is used to describe periods of stasis in the fossil record?

Punctuated equilibria Signup and view all the answers

Which sunflower species originated from the hybridization of two other sunflower species?

Helianthus anomalus Signup and view all the answers

In Japanese Euhadra snails, what is controlled by a single gene?

Shell spiral direction Signup and view all the answers

What factor influences pollinator preference in monkey flowers (Mimulus)?

Flower color Signup and view all the answers

How long can the interval between speciation events range, based on the text?

40 million years Signup and view all the answers

What does macroevolution represent?

Cumulative effect of both speciation and extinction events Signup and view all the answers