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Volpe's Understanding Evolution 7th Edition by Peter Rosenbaum
النسخة 7الرقم المعياري الدولي: 978-0073383231Volpe's Understanding Evolution 7th Edition by Peter Rosenbaum
النسخة 7الرقم المعياري الدولي: 978-0073383231 تمرين 7
What has happened to the frequency of the sickle cell gene in African Americans since they were removed from Africa and the conditions that promoted sickle cell trait?
A) The incidence of the gene has declined.
B) The mutation rate for the gene has declined.
C) The selective advantage to heterozygotes has increased.
D) The rate of the sickle cell has remained unchanged.
E) The rate of the sickle cell gene has increased as medical science has created effective treatments for sickle cell anemia.
A) The incidence of the gene has declined.
B) The mutation rate for the gene has declined.
C) The selective advantage to heterozygotes has increased.
D) The rate of the sickle cell has remained unchanged.
E) The rate of the sickle cell gene has increased as medical science has created effective treatments for sickle cell anemia.
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The incid...
Volpe's Understanding Evolution 7th Edition by Peter Rosenbaum
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