TAMU BIO 112 REAL COMPLETE EXAM WITH
DETAILED ANSWERS 2025
How is sickle-cell anemia an example of
heterozygote advantage? - answer-
Heterozygotes are resistant to malaria but do
not have severe sickle-cell disease.
Why do HbS allele frequencies increase after
malaria outbreaks? - answer-Because
heterozygotes survive malaria at higher rates.
What is genetic variation? - answer-Heritable
differences in DNA among individuals in a
population.
Why is genetic variation important for
evolution? - answer-It provides the raw
material for natural selection to act on.
, What 3 things are required for natural
selection to occur? - answer-Variation,
Heritability, Differences in fitness
(survival/reproduction).
Define Natural Selection. - answer-Process
where individuals with beneficial heritable
traits survive and reproduce more, changing
allele frequencies over time.
What is a gene pool? - answer-All alleles
present in a population.
What is population genetics? - answer-Study of
how allele frequencies change over time.
What is adaptation? - answer-A heritable trait
that increases survival or reproduction.
DETAILED ANSWERS 2025
How is sickle-cell anemia an example of
heterozygote advantage? - answer-
Heterozygotes are resistant to malaria but do
not have severe sickle-cell disease.
Why do HbS allele frequencies increase after
malaria outbreaks? - answer-Because
heterozygotes survive malaria at higher rates.
What is genetic variation? - answer-Heritable
differences in DNA among individuals in a
population.
Why is genetic variation important for
evolution? - answer-It provides the raw
material for natural selection to act on.
, What 3 things are required for natural
selection to occur? - answer-Variation,
Heritability, Differences in fitness
(survival/reproduction).
Define Natural Selection. - answer-Process
where individuals with beneficial heritable
traits survive and reproduce more, changing
allele frequencies over time.
What is a gene pool? - answer-All alleles
present in a population.
What is population genetics? - answer-Study of
how allele frequencies change over time.
What is adaptation? - answer-A heritable trait
that increases survival or reproduction.
