Question

You are studying the ability of deer mice to respond to selection on burrow construction behavior. You take a single large population and divide them randomly into two groups for selection experiments. The groups are placed in two different field sites, one with fencing to exclude weasel predators, and the other without fencing and susceptible to predation. The mean tunnel length made by the starting population in both environments is 80 cm. The mice that survive at each site are able to mate. The offspring of both groups are placed in new fields without predators, and their tunnel building behavior is tested. The results are shown in the following table: Site | Mean tunnel length of starting population | Mean tunnel length of survivors | Mean tunnel length of offspring ---|---|---|--- Predator-free site | 80 cm | 80 cm | 80 cm Site with predators | 80 cm | 120 cm | 90 cm Which of the following statements are correct explanations or inferences for the difference in results between the two sites? For each choice, select CORRECT or NOT CORRECT. - Tunnel length has zero heritability at the predator-free site. [ Choose ] - There is no selection for longer tunnels at the predator-free site. [ Choose ] - Mice who build longer entrance tunnels appear to be less likely to be eaten by predators. [ Choose ] - Mice choose to build longer tunnels when predators are present. [ Choose ]

          You are studying the ability of deer mice to respond to selection on burrow construction behavior. You take a single large population and divide them randomly into two groups for selection experiments. The groups are placed in two different field sites, one with fencing to exclude weasel predators, and the other without fencing and susceptible to predation. The mean tunnel length made by the starting population in both environments is 80 cm. The mice that survive at each site are able to mate. The offspring of both groups are placed in new fields without predators, and their tunnel building behavior is tested. The results are shown in the following table:

Site | Mean tunnel length of starting population | Mean tunnel length of survivors | Mean tunnel length of offspring
---|---|---|---
Predator-free site | 80 cm | 80 cm | 80 cm
Site with predators | 80 cm | 120 cm | 90 cm

Which of the following statements are correct explanations or inferences for the difference in results between the two sites? For each choice, select CORRECT or NOT CORRECT.

- Tunnel length has zero heritability at the predator-free site. [ Choose ]
- There is no selection for longer tunnels at the predator-free site. [ Choose ]
- Mice who build longer entrance tunnels appear to be less likely to be eaten by predators. [ Choose ]
- Mice choose to build longer tunnels when predators are present. [ Choose ]

You are studying the ability of deer mice to respond to selection on burrow construction behavior. You take a single large population and divide them randomly into two groups for selection experiments. The groups are placed in two different field sites, one with fencing to exclude weasel predators, and the other without fencing and susceptible to predation. The mean tunnel length made by the starting population in both environments is 80 cm. The mice that survive at each site are able to mate. The offspring of both groups are placed in new fields without predators, and their tunnel building behavior is tested. The results are shown in the following table:

Site | Mean tunnel length of starting population | Mean tunnel length of survivors | Mean tunnel length of offspring
—|—|—|—
Predator-free site | 80 cm | 80 cm | 80 cm
Site with predators | 80 cm | 120 cm | 90 cm

Which of the following statements are correct explanations or inferences for the difference in results between the two sites? For each choice, select CORRECT or NOT CORRECT.

- Tunnel length has zero heritability at the predator-free site. [ Choose ]
- There is no selection for longer tunnels at the predator-free site. [ Choose ]
- Mice who build longer entrance tunnels appear to be less likely to be eaten by predators. [ Choose ]
- Mice choose to build longer tunnels when predators are present. [ Choose ]

Added by James D.

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