Explore BrainMass

Balanced polymorphism

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

7. Explain why the increased prevalence of sickle cell disease among African Americans actually has more to do with the environment than skin color or other phenotypes used to define races.
8. List other examples of balanced polymorphism.
9. Identify a population group with a high prevalence of sickle cell disease other than Africans.
10. List six genetic diseases that are more common among Ashkenazi Jews than among other population groups

© BrainMass Inc. brainmass.com October 25, 2018, 9:10 am ad1c9bdddf

Solution Preview

Research suggests that sickle cell anemia is a evolutionary genetic disorder to combat Plasmodium infection (Malaria). One must get the sickle cell gene from both the mother and father to be affected, however, recent studies indicate that those who have the gene from one parent (without the ...

Solution Summary

This solution briefly discusses the relationship between sickle cell anemia and malaria infection in the context of balanced polymorphism, and gives links for further exploration.

See Also This Related BrainMass Solution

Genetics: DNA and inheritance

The Hardy-Weinberg equilibrium states that allele frequencies remain constant across generations unless certain influences are introduced, such as nonrandom matings or mutations.

Describe the Hardy-Weinberg principle.
Are there influences that deviate from the principle? If so, what are they? If no, why?
Deoxyribonucleic acid (DNA) profiling is a tool used in forensic investigation and paternity testing. This technique is often used by forensic scientists to identify individuals on the basis of their DNA profiles.

How is DNA profiling performed?
What are some of the novel uses of DNA profiling, other than those described in your textbook?
Sickle-cell disease is an example of balanced polymorphism as carriers of this disease are protected against malaria.

Describe an example of balanced polymorphism, other than sickle-cell disease, glucose-6-phosphate dehydrogenase (G6PD) deficiency, phenylketonuria (PKU), prior protein mutation, cystic fibrosis (CF), and Smith-Lemli-Opitz syndrome (SLOS).

Genetic ancestry testing is becoming popular as more and more people are trying to trace their ancestry. Two different types of tests are generally offered, mitochondrial DNA, which traces maternal lineages, and Y chromosome testing, which traces paternal lineages.

Does genetic ancestry testing provide a complete picture of a person's heritage? If so, how? If not, why not?

View Full Posting Details