Exam 15: Changing Allele Frequencies

A typhoon devastates a population on "island A" and only a few individuals survive.Several generations later,the replenished population suffers from several inherited disorders that are very rare in other groups.A genetic event that explains this is

Control of human reproduction to achieve a societal goal is called

Mutation differs from other sources of genetic variation because it

Natural selection has fueled the rise in MRSA (methicillin-resistant Staphylococcus aureus)infection by

The prevalence of a Y chromosome with the same sequences as Genghis Khan illustrates

Genetic disorders such as Tay-Sachs disease,Bloom syndrome,Gaucher disease,and Canavan disease are more common in Ashkenazi Jewish populations because

Members of two populations in different parts of the world have the same form of inherited breast cancer.The affected individuals in each population have only one specific mutation,but it is different between the two populations.An explanation for this mutation difference among these populations is

The frequency of the allele that causes sickle cell disease is higher in some populations than in others because

_____ in the mycobacterium tuberculosis population reduced the incidence and virulence of tuberculosis in the early twentieth century.

The gradual change in specific human mitochondrial DNA sequences along a river illustrates

A founder effect occurs when

Resistance of sickle cell disease carriers to malaria illustrates

To determine the evolutionary history of a gene,geneticists assume that the most prevalent alleles in a population

A person who is a heterozygote for G6PD deficiency is protected against

In 1910,Charles Davenport opened the Eugenics Record Office at Cold Spring Harbor.He believed "feeblemindedness" was

Clines are created when

A genetic signature for positive selection is

_____ maintains deleterious alleles in a population.

Which of these affects allele frequencies the least?

A sharp cline may indicate