Biology 7.1 Quiz

Early ideas about inheritance were credited to Jean-Baptiste Lamarck. Which choice below fit's Lamarck's theory best?

• Traits are inherited from parents initact

• Traits changed as the organism uses them

• Traits are passed down as dominant or recessive genes

• Traits are randomly assigned by meiosis

Darwin's theory of natural selection is based upon three principles. Which of the following is not one of these principles?

• Characteristics of organisms must be passed from parent to offspring

• There must be more offspring produced that resources can support

• There must be a wide variety of traits in a population

• There must be a high rate of mutation within the population

Natural selection hinges on variation in a population. There are two main areas where variation can originate. Which is not one of these areas?

• Mutations in heritable DNA

• Crossing over in meiosis

• Diseases in the environment

A heritable trait that can enhance the survivability of a population is called ...

• adaptation

• modification

• evolution

• genetic drift

Homologous structures are those that show similar structures, yet have different functions (human arm and dolphin flipper). These changes that arise when two species evolve from a common ancestor is called ...

• divergent evolution

• convergent evolution

• common evolution

• speciated evolution

Analogous structures are those that show similar function, yet have different structures (butterfly wing and bird wing). These changes that arise when two species evolve from a different ancestor and is called ...

• divergent evolution

• convergent evolution

• common evolution

• speciated evolution

There are five genetic pressures that can adjust the allele frequencies in a population. Which of the following is not one of these pressures?

• Natural Selection

• Mutations

• Genetic Drift

• Nonrandom mating

• Small populations

The frequency of two alleles in a gene pool is 0.19 (A) and 0.81 (a). Assume that the population is in equilibrium and calculate the percentage of heterozygous individuals in the population.

• 0.31

• 0.75

• 0.25

• 0.87

A _____ selection is one that selects for the moderate trait in a population.

• Stabilizing

• Directional

• Disruptive