Biology, 04.08.2019 17:30 eldercunningham
Sickle-cell disease is clearly a debilitating disease, but why does the mutated beta-globin allele persist? a. the mutated allele offers some protection (selective advantage) against malaria when in the heterozygous state with the normal allele. b. mutations keep the mutated allele at high frequency throughout the world. c. genetic drifts prevents the mutated allele from disappearing. d. the mutated allele once provided a selective advantage in homozygous individuals, and may once again do so in the future. e. none of the other answer choices are correct.
Answers: 1
Biology, 21.06.2019 21:30
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Biology, 22.06.2019 00:00
Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.
Answers: 1
Biology, 22.06.2019 05:30
What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism
Answers: 2
Sickle-cell disease is clearly a debilitating disease, but why does the mutated beta-globin allele p...
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