Speciation Flashcards
In allopatric speciation takes place by _______ the populations
physically seperating
Examples of allowpatric speciation:
A grand canyon:
Isthmis of panama:
Antelope squirrels on the rim of the Grand Canyon have Geographic Isolation
Isthmis of Panama has a Geographic Barrier
When somewhat isolated populations come into contact hybrid zones may form depending on the level of speration three outcomes can result: what are the different outcomes?
A) Reinforcing the barrier is _____ and wiill result in _ species
B) Fusion the barrier is ____ and weill result in _ species
C) Stability thebarrier is _____ amd will in _ species
D) When i first learned bird ID there was one species a northen Oriole that had two variants Baltimore orioles on the east coast and bullocks oriell on the west coause. THey interbred extensively in the midewerst. Scienteist reasoned that because of this hybridization in time the two kinds of orioles would blend into one single kind of oriole. Studies have shown that these hybrid traits didn’t leave the zone. Now, they are two seperate species. THis tutned out to be ____ hybrid zone
Strengthened 3
Closing 1
Stable 3
Stabalizing
Sympatric speciation is a new species forming ____ the home range of the ancestral species
within
A _______, ______, or _______ isolation often develope between populations forming the new species
Behavioral, Temporal, or alloploidy
Two sparrows sing a ong. One within range has a unique song. THe individuals only recognize and breed other individuals signing the correct version of their song. A biologist determines there are now two species, based on a ___ zygotic barrier of ____ and being ____patric speciaton
pre, behaviroal isolation, allo
Even though they can form mules, horses and donkeys are seperate species based on a ___zygotic barrier of ____ fitness
Post, ?
In ___polyploidy a single species gives rise to a new daughter species by meiotic non-disjunction (genetics)
Auto
In ____polyploidy a two or more species gives rise to a new daughter species by meiotic non-disjunctio
Alloy
If species A is 2n=14 and species B 2n=8 the new allopolyploid species would be 2n=___
22
Bread wheat is the result of combining _ wild wheat species
3
In a species complex or a ring species some groups of populations can ____ with their neighbors, yet they ______ with other groups, often on the extremes of the distribution.
Reproduce, cannot interbred
In our Salamander, a ring species, some adjacent populaitons cannot _____ yet theoritically gene flow could still exist by breeding with _______
Reproduce, two populations
