Peer Grading

5/15 or 5/16

Peer Grading

• Cover Page – page 440– 1 pt for 4 or more colors– 1 pt for title “Evolution”– 1 pt for relevant picture– 1 pt for having tab– 1 pt for neatness

= 5 points total

Peer Grading

• Breeding Bunnies – Page 446– Graph: • ½ point for title (“Effect of environment on bunny allele

frequencies” OR “Bunny allele frequencies over time” OR “Numbers of bunny alleles in a population” ETC…)

• ½ point for X-axis labeled (Generation)• ½ point for Y-axis labeled (Number of alleles)• ½ point for points plotted accurately

Peer Grading

• Breeding Bunnies – Page 447– Data table• 1 point

Peer Grading• Page 447 -- Discussion Questions1. Compare the frequencies of the dominant allele (F) to the

frequencies of the recessive allele (f). Did the frequencies differ? Why or why not? Explain if this data agreed or disagree with your prediction about the frequency of F and f alleles in your population.

After the first generation the dominant allele was seen more frequently than the recessive allele (1 pt). Bunnies who have the recessive allele do not live through winter and pass on their genes, which causes the allele frequencies to differ (1 pt). This data agreed/disagreed with my prediction because… (1 pt).

Peer Grading• Page 447 -- Discussion Questions2. In a real rabbit population animals immigrate and emigrate. Define these terms. Then describe how immigration and emigration might affect the gene frequency of F and f in this population of rabbits.

Immigration occurs when organisms move into an area (1 pt). Emigration occurs when organisms move out of an area (1 pt). If bunnies with the recessive allele are moving into an area, the recessive allele frequency might stay the same or even increase. If bunnies with the dominant allele are moving into an area, the recessive allele might decrease even faster. (2 pts)

Peer Grading• Page 447 -- Discussion Questions3. How has evolution (descent with modification) changed the population of rabbits?

This population changed from half fur-less, half furry to a majority of furry bunnies. Over time the population has been modified by the environment, which is selecting against bunnies with out fur. (2 pts)

Peer Grading

• Breeding Bunnies– Add up total out of 14 points.

Peer Grading– Color (2 pts) & mark the text (page 458-459)

• Underline facts or evidence that supports evolution. – 2 pts

• Circle words you don’t understand. – 1 pt

– Color (2 pts) & mark the text (page 460-461)• Circle words you don’t understand.

– 1 pt• Choose a minimum of three words to look up (online, textbook)

and write the definition in the margin in your own words. – 3 pts

Peer Grading

• Peppered Moth Survey (pages 463-465)

Lab: Peppered Moth Survey

Series 1: Light MothsSeries 2: Dark Moths

0 1 2 3 4 5 6 7 8 9 100

100

200

300

400

500

600

700

The Effect of the Industrial Revolution on Natural Selection of Peppered Moths

Series1Series3

Year

Num

ber o

f Mot

hs

½ point for each:-- Key-- X-axis label-- Y-axis label-- Dark moth line-- Light moth line

What preys on the peppered moths?

• Insectivorous Birds

½ point

If the bark of trees is dark and the moths that rest there are light colored, what might happen to the moths?

• Dark moths will survive and reproduce more often than the light colored moths, that get eaten by predators.

½ point

What is a mutation?

• A change in DNA sequence

½ point

What could have caused the first few moths to change from a light variety to a dark variety?

• A mutation introduced variety or genetic diversity.

½ point

What event caused the tree trunks of many trees in England to turn from light to dark?

• Industrial Revolution – soot was being released into the air from factories, which covered the tree trunks and turned them dark.

½ point

Which variety of moths increased over the 9-year period?

• Dark moths½ point

What is the name of the evolutionary process?

• Natural Selection or microevolution

½ point

What can you conclude about the population of peppered moths in the sampled area of England?

• Gene frequency for dark moths increased, while gene frequency of light moths decreased.

• Dark moths had more reproductive success than light moths and passed on their genes.

1 point each bullet point

Explain the reason for the increase in dark-colored moths?

• The dark colored moths escaped predation from the birds, since they blended into their environment (camouflage). 2 pts

What effect would cleaning up the environment have on the population of peppered moths?

• The gene frequency will probably shift again from dark to light. Cleaning of the environment would mean less soot covering trees.

2 pts

Propose a hypothesis for the recent increase of antibiotic resistant bacteria?

1. There is genetic variation.- Some bacteria have low

resistance to antibiotics, while others have a higher resistance.

2. Antibiotics select against the non-resistant forms.

3. Resistant bacteria can reproduce at a much higher success rate than non-resistant forms.

4. Final population have higher frequencies of resistant genes than non-resistant genes.

2 pts

Peer Grading

• Peppered Moth Survey – Add up total out of 14 points

Peer Grading

• Macroevolution Lab (page 476)

• 1 pt per question