Microevolution Formative Assessment

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Which Biology class are you in?

• 1st

• 2nd

• 3rd

1. A student is given four components of evolution, shown in the four boxes here. Which statements can be formed using the terminology shown here to accurately describe the evolution within a species?

• individuals undergo evolution depending on the genetics of the populoation

• populations have individuals with constantly changing genetics that lead to evolution

• individuals have different genetics, leading to the evolution of populations

• populations are able to undergo evolution so they can create the specific organism that they want

2. Webbed feet is a recessive trait in iguanas. The chart shows the prevalence of alleles for webbed feet over three generations. Analyze the data for evidence of evolution. Choose the 3 correct statements supported by the data.

• natural selection is occurring

• the iguanas probably moved onto land

• webbed feet became more common over time

• there is a selective advantage for iguanas with webbed feet

• there were equal numbers of iguanas with and without webbed feet in generation 2

3. The genotype for webbed feet is __________.

• homozygous dominant

• homozygous recessive

• heterozygous

• incomplete dominant

• co-dominant

4. If the trait for webbed feet is recessive, why does it become 90% prevalent by the 3rd offspring generation?

• this allows for larger foot size thus letting them move faster through the sandy environment than other individuals

• the webbed feet iguanas must have an environmental advantage over the individuals who do not, therefore allowing them to be better fit for the environment

• this would not have an affect on the population overall, the data is skewed and/or incorrect

• all of the above

5. If generation on has a 50% non-webbed and a 50% webbed offspring ratio, what must the genotypes of the first two parents be? _____ x _____

• WW x ww

• Ww x ww

• WW x WW

• WW x Ww