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Sickle-cell anemia is caused by a mutation in the ß-globin gene. Heterozygotes for the Hbs disease allele have some protection from malaria relative to wild-type, but Hbs homozygotes rarely live to produce offspring. 50 individuals homozygous for the normal (non-disease) allele produced a total of 47 children. 50 heterozygous individuals produced a total of 55 children. 50 Hbs homozygous individuals produced a total of 0 children. What is the average fitness per individual of the heterozygotes? What is the relative fitness of the homozygous normal individuals?
when flavoprotein transfers electrons directly to the final electron acceptor hydrogen peroxide is produced. What other consequences might result from electron carriers in the ETC being bypassed?
Assume that we have a population of three yellow phenotypes, three blue phenotypes, and three green phenotypes. A yellow phenotype then immigrates into the population. What are the genotype and allele frequencies after the immigration?
What is the difference between homology and homoplasy (2)? Give an anatomical or a molecular example of each (2). Propose a hypothetical evolutionary explanation for your example of homoplasy (1)?
Determine which of the following can contribute to stabilization of the secondary structure of a protein? (Select ALL that are TRUE.
On a day with an air temperature of 75°F, you read the psychrometer and determine the relative humidity to be 74%. A sudden weather change (that does not affect the actual moisture content of the air) reduces the relative humidity to 70%. What was..
What are two domains that that all eukaryotic transcription factors must have? Describe the function of each of these. What are two other domains that transcription factors can have.
The condition "xeroderma pigmentosum" is characterized by high rates of skin cancers like malignant melanoma. It is caused by mutations in any of many genes that encode enzymes that participate in:
What is the main difference between enveloped and nonenveloped viruses? How does this affect entry of each kind of virus into the host cells? Variances are expressed.
How does a scientific theory differ from a scientific hypothesis.
explain what an isotonic point is and compare different plant cells (aquatic, marine, terrestrial plant cell) istonic points with each other and also with sea water. is there any relationship between isotonic points and environment in which the pl..
Explain how plants can regulate temperature and water. Give examples of at least 6 different adaptations and explain the role of each in temperature and/or water regulation.
Explain why do phage have the potential to be a good therapeutic option for killing bacteria?
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