Question

In the chart below, the colors represent fur color in a species of hypothetical rabbits. Which factor represents the evolutionary results of the bottleneck effect on the initial population?
C
A
B
All of the above are correct.

Answer 1

@shrutipande9 im so confused

Answer 2

I would say C because its taking over? None of this was in my past lesson so im not 100% sure what its talking about

Answer 3

do u know what is the bottleneck effect?

Answer 4

no

Answer 5

A population bottleneck is a sharp reduction in the size of a population due to environmental events (such as earthquakes, floods, fires, or droughts) or human activities (such as genocide).

Answer 6

so in initial population 4 types of fur in equal proportion. then in factor A probably due to mutation one fur colour is added. so actualy no reduction in population. then in B white substantially increases and others reduce. and then in C 2 fur colors are completely eliminated. so there is absolute reduction or destruction population having those 2 fur colors

Answer 7

so what exactly am i looking for, that would help.

Answer 8

mrdoldum to rescue..:D

Answer 9

actually there is reduction in population in all 3 factors....

Answer 10

I don't like cherry starbursts. We have a population of starbursts, 100 starbusts. 33 cherry, 33 lemon, 34 orange. In a fit of sugar craving rage, I eat 90% of the lemon and the oranges, leaving a population made almost entirely of cherry.

Boom, a bottleneck.

Answer 11

So it would be A since they are all somewhat being down sized

Answer 12

Ok so no A, that helped.

Answer 13

Its C

Answer 14

Usually, in these examples, the examples are to the extremes. Which one experiences the most extreme reductions?

Answer 15

C

Answer 16

I find these examples pretty poor, but I think C is the most likely answer, yes.

Answer 17

Lol that was probably the best way to put it! thanks!

Answer 18

does the ques say extreme reduction?

Answer 19

I think B would be much more likely to be a population under extreme selection that either promotes the white or selects against all other colors.

Answer 20

Or both types of selection.

Answer 21

Im confused again

Answer 22

In the B, we see that the white now dominates the population. Since we have all the other colors, it seems that three things may be the explanation:
1) white is under strong positive selection, increasing it in the population
2) all the other colors are under extreme negative selection, decreasing them in the population
3) both 1 and 2 are occurring.

Answer 23

So A is out, And C is to extreme.

Answer 24

No, sorry. C is good. Bottlenecks, are by definition, the most extreme event. Something like a meteor hitting the Earth would be a good example of a bottleneck causing event.

Or, something like humans killing off nearly all of a species.

The biggest factor to recognize a bottleneck event is evidence of massive loss of genetic diversity. We lost two colors from the original to C.