Question

You are studying two populations of snails that are separated by a river that formed in the last hundred years. Recently (in the last year), a bridge has connected both sides of the river allowing the snails to cross. When individuals of the two populations mate, their hybrid (i.e., a mix of the two groups) offspring have equal fitness to either parental population. What (if any) impact would you expect this to have on the rate of speciation between these snail species?

Name: you are studying two populations of snails that are separated by a river that formed in the last hundred years recently in the last year a bridge has connected both sides of the river allowi 37087
Uploaded: 2023-09-17T12:59:10-08:00
Duration: 2 min 48 s
Channel: Kaela Piechowicz
Description: you are studying two populations of snails that are separated by a river that formed in the last hundred years recently in the last year a bridge has connected both sides of the river allowi 37087

          You are studying two populations of snails that are separated by
a river that formed in the last hundred years. Recently (in the
last year), a bridge has connected both sides of the river allowing
the snails to cross. When individuals of the two populations mate,
their hybrid (i.e., a mix of the two groups)
offspring have equal fitness to either parental
population. What (if any) impact would you expect this
to have on the rate of speciation between these snail
species?

Added by Deborah E.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Kaela Piechowicz

09/17/2023

Step 1

Before the bridge was built, the two populations of snails were separated by a physical barrier (the river), which prevented them from interbreeding and exchanging genes. This isolation could have led to genetic divergence over time, as each population adapted to Show more…

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You are studying two populations of snails that are separated by a river that formed in the last hundred years. Recently (in the last year), a bridge has connected both sides of the river allowing the snails to cross. When individuals of the two populations mate, their hybrid (i.e., a mix of the two groups) offspring have equal fitness to either parental population. What (if any) impact would you expect this to have on the rate of speciation between these snail species?