Checkup Practice Answers Variation : Bird Beak lengths range from 5cm to 15cm Inheritance:

# Checkup Practice Answers Variation : Bird Beak lengths range from 5cm to 15cm Inheritance:

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## Checkup Practice Answers Variation : Bird Beak lengths range from 5cm to 15cm Inheritance:

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1. Checkup Practice Answers Variation: Bird Beak lengths range from 5cm to 15cm Inheritance: DNA codes for the bird’s beak length and is passed on to offspring. Population Limits: Food (fruit and seeds) which were influenced by the drought.

2. Environmental Selection: Birds with longer beaks (15 cm) were the most successful at getting food/surviving and then reproducing.

3. Make a graph that shows the bird’s beaks are similar but not identical to one another Mean (average) beak length Beak Length (cm)

4. Make a graph that shows how the average beak length increased over a few years

5. Calculate the average beak length in generation 1 and generation 4 Generation 1= 6(5cm)+8(10cm)+ 7(15 cm) / total individuals= Generation 4= 12 cm 10cm

6. Key: 5 cm beak length 10 cm beak length 15 cm beak length Frequency 15 45 35 30 40 20 50 10 25 5 2 3 4 1 Generations