A source of human genetic variation is _____________. mutation natural selection
ID: 3167076 • Letter: A
Question
A source of human genetic variation is _____________.
mutation
natural selection
genetic drift
geography
Genotypic variation (the variety and frequency of alleles) is increased by _________.
gene flow and genetic drift
genetic drift, and natural selection
natural selection and genetic drift
mutation and gene flow
What does skin color tell you about a person?
Indicates his/her race
Indicates the person’s cultural traits and values
Indicates a person’s susceptibility to certain diseases
none of the above
What is an autoimmune disease?
when you antibodies attack your own tissues as if they were foreign
the type of immunity found in people with sickle cell anemia
an immunity that turns on automatically
the type of immunity where the body does not recognize foreign bodies.
In order to learn about the relationships among populations, we would need to examine the variation in DNA caused simply by ________.
genetic drift
allelic recombination at the Y chromosome
mutation
gene flow
Explanation / Answer
1. Natural selection: genetic variation is greatly influenced by natural selection as natural selection can only increase and decrease the frequency of an already existing population.
2. Genetic variation is increased by natural selection and genetic drift
3. none of the above
skin colour will not indicate the person race as the race it not only depends on skin colour but also on the social status of the individual. So by seeing skin colour, we cannot predict individual race, cultural traits and value.
4. When you antibodies attack your own tissues as if they were foreign.
In autoimmunity, antibodies start attacking their own body tissue as they considered it as foreign.
5. gene flow
Gene flow is the transfer of genetic diversity from one population to another. This may result in the change of allele frequency.
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