Bio Clicker Questions Flashcards


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1

All of the following ideas influenced Darwin’s thinking except:

Mendelian Genetics

2

Which of the following statements is false?

Evolution involves a directional pattern, typically striving towards a higher form

3

Which of the following is an example of biological evolution? 5

1. An individual develops from a larval tadpole into an adult frog
2. A population of macaques learns to wash sweet potatoes by observing others
3. Over many generations, trees replace grasses and shrubs in a plant community
4. All are examples of biological evolution
5. None are examples of biological evolution

4

If you cross DD with dd, you will obtain offspring with what phenotypes?

All D

5

If you cross Dd with Dd, the offspring could have how many different genotypes?

3 types

6

Each of the following is an exception to Mendelian genetics, but for…

Law of independent assortment

7

If Mendel had picked traits on the peas that were polygenic, he would not have been able to reach his main conclusion

True

8

If you see a correlation between birth family and hunting prowess, what does this mean?

Hunting prowess is genetically controlled

9

A species in one environment has broad leaves, but thin leaves in another environment. What can explain this difference?

Both

10

When tadpoles are exposed to high levels of predation throughout development, they often develop longer legs that will help the adult frog evade predation. This is an example of…

Environmental effects

11

You’re interested in understanding why growth rates vary among populations of a given species of tree. You realize this variation can be due in large part to on of two factors, genetic variation or environmental variation, so you design a common garden experiment and the results suggest that growth rate among populations is highly variable when grown under similar conditions. What would you conclude is the most likely explanation for this variation?

Genetic differences

12

If a population is in Hardy Weinberg equilibrium then that population is…

Not evolving

13

If all Hardy-Weinberg assumptions are met in a population, genotype frequencies in the next generation will…

Both 2 and 3

14

In a population at Hardy-Weinberg equilibrium with two alleles, A and a, 264 of the 1200 individuals display the recessive trait (aa). What is the estimated frequency of the A allele?

53%

15

What would a graph of midparent beak depth vs offspring beak depth look like if beak depth is heritable?

Positive Correlation

16

Habitat loss due to human development causes a decrease in nesting habitat for the migratory Wood Thrush such that only individuals that migrate early are able to obtain suitable nesting sites. H2 for the behavior to migrate early is high (.60). Which explains this mechanism?

Selection

17

T or F: The appearance or performance of an individual is the result of its genotype minus any effect from the environment.

False

18

Which is true?
Natural selection cannot be progressive because of its random nature.
Natural selection acts directly on phenotypes and indirectly on genotypes.
Selection generally leads to perfection of existing traits.
Natural selection acts on populations, but its consequences occur in individuals.
Natural selection usually results in an immediate increase in population variation.

Natural selection acts directly on phenotypes and indirectly on genotypes

19

If the alleles A and a conform to HW equilibrium, and if the frequency of a is 0.25, which of the following is the most common genotype in the population?

AA

20

What sort of selection is the graph showing? Graph shows a negative correlation.

Directional

21

What kind of selection is this? Graph shows two ends low and middle high.

Stabilizing

22

Adaptations should be the result of evolution by natural selection.

True

23

Natural selection is the only known explanation for adaptation

True

24

Is color adaptive?

Maybe, because nothing was said about fitness in the question. It must increase fitness to be adaptive.