Question

finches has now developed into two separate species - those with large beaks and those with smaller beaks. speciation that occurs while organisms still live amongst each other (in the same geographic area) is called sympatric speciation. as you saw earlier, this form of speciation can occur when new food sources are introduced to a population. some members develop traits to best consume the new food and, over time, these traits may affect their ability to mate with other parts of the population. sort the following events that lead to sympatric speciation in a population of african cichlids living in a lake. start end sort from top to bottom. the start of speciation should be at the top and the bottom should be where speciation has occured. blue fish can no longer mate with yellow fish. by chance a number of offspring are born with blue bodies. blue bodied fish choose to mate with only those of similar colors. after generations of sexual selection, the genetic composition of blue fish is different from yellow fish. all fish in the lake have yellow color. end sympatric speciation has occurred.

Explanation:

Sympatric speciation starts with a homogeneous population. Mutations introduce variation, followed by non - random mating based on the new trait. Over generations, genetic divergence occurs until reproductive isolation is achieved.

Answer:

1. All fish in the lake have yellow color.
2. By chance a number of offspring are born with blue bodies.
3. Blue bodied fish choose to mate with only those of similar colors.
4. After generations of sexual selection, the genetic composition of blue fish is different from yellow fish.
5. Blue fish can no longer mate with yellow fish.
6. End Sympatric speciation has occurred.