Description
1. Study the Lecture Notes for this assignment. Fill in the Punnett Square below crossing a
heterozygous male with a heterozygous female for eye color trait.
A
a
A
a
Thus,
percent of the offspring will have the genotype Aa.
offspring will have the genotype AA.
percent of the
percent of the offspring will have the genotype aa.
percent of the offspring will show the phenotype of dark eyes and
percent
of the offspring will show the phenotype of blue eyes.
2.Study Lecture Notes for this week. Consider our hypothetical population of 1,000 individuals for the
trait eye color. Assume the population is at an initial state with genotypic frequencies:
BB(25%); Bb(50%) and bb(25%).
In what way would these genotypic frequencies change as a result of repeated large migrations of dark-eyed
individuals into the population?
3. Consider the following statement: “Blue eyes must somehow be adaptive or the phenotype would have
been eliminated from the population.” Do you think this is a valid statement? Please answer “Yes” or “No”
and explain your answer using the information in the Lecture Notes for this week.
4. Review the information in the Lecture Notes for this week. Then, consider the following hypothetical
statement: “A strict program of eugenics, applied for five generations, would eliminate, completely and
forever, all genetically based physical handicaps from any given population.” Do you agree or disagree with
this statement. Explain your answer.
5. Define the term variation as it is used throughout Chapter 4.
6. Compare and contrast polygenic and Mendelian traits.
7. What are clinal distributions and what do they reflect?
8.Explain the two-stage process of “modern synthesis”?
9. Define genetic drift. How are founder effect and genetic drift related?
10. Discuss how cheetahs demonstrate the phenomenon of genetic bottleneck.
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