Why was the reduction of the bison population to under 1,000 individuals a bottleneck event for the species?
a.
It drastically reduced the gene pool of the species.
b.
It reduced the territorial range available to the species.
c.
Foreign genes were introduced by crossbreeding with cattle.
d.
It reduced the prevalence of recessive traits.

Question

Why was the reduction of the bison population to under 1,000 individuals a bottleneck event for the species?
a.
It drastically reduced the gene pool of the species.
b.
It reduced the territorial range available to the species.
c.
Foreign genes were introduced by crossbreeding with cattle.
d.
It reduced the prevalence of recessive traits.

cathyangs · Answer

Do you know what a "Bottleneck" is general is? the non-biology definition is when a large group is slimmed down to a smaller group - bottlenecks happen when a crowd tries to get through a door, etc. 

This sounds like either options A or B - a 'limiting' or 'narrowing' of something. The Biology definition of "bottleneck" applies to the population, so the answer would be a, as it is a limiting of the population's gene pool.