ASU BIO 182 EXAM 2 EXAM UPDATED
ACTUAL QUESTIONS WITH CORRECT
ANSWERS
◉ linked alleles/genes.
Answer: -genes are close together on the same chromosome
‑breaks the law of independent assortment
‑genes closer to each other on a chromosome are less likely to
recombine during crossover
◉ crossing over enables_____.
Answer: an organism to recombine alleles on the same chromosome
with alleles on a homologous chromosome
◉ genetic drift.
Answer: -a process through which populations evolve randomly
‑by chance, some individuals have more offspring than others
‑smaller populations evolve rapidly
◉ Bottleneck effect.
, Answer: -loss of genetic diversity following a sudden drop in a
population
‑can occur in a single generation
◉ genetic drift occurs when_____.
Answer: a portion of the population dispersed to a new habitat/
becomes separated by a physical barrier
◉ founder effect.
Answer: -loss of alleles that occur when individuals start a new,
smaller population
‑increases chances of genetic disorder
◉ natural selection.
Answer: -causes phenotypes to evolve in a particular direction
‑requires repeatable differences in reproductive success among
genotypes
‑always causes adaptation of a trait
‑most important mechanism of evolution in large populations
◉ Genetic drift.
Answer: -has a large effect on allele frequency in small populations/
small effect on large populations
ACTUAL QUESTIONS WITH CORRECT
ANSWERS
◉ linked alleles/genes.
Answer: -genes are close together on the same chromosome
‑breaks the law of independent assortment
‑genes closer to each other on a chromosome are less likely to
recombine during crossover
◉ crossing over enables_____.
Answer: an organism to recombine alleles on the same chromosome
with alleles on a homologous chromosome
◉ genetic drift.
Answer: -a process through which populations evolve randomly
‑by chance, some individuals have more offspring than others
‑smaller populations evolve rapidly
◉ Bottleneck effect.
, Answer: -loss of genetic diversity following a sudden drop in a
population
‑can occur in a single generation
◉ genetic drift occurs when_____.
Answer: a portion of the population dispersed to a new habitat/
becomes separated by a physical barrier
◉ founder effect.
Answer: -loss of alleles that occur when individuals start a new,
smaller population
‑increases chances of genetic disorder
◉ natural selection.
Answer: -causes phenotypes to evolve in a particular direction
‑requires repeatable differences in reproductive success among
genotypes
‑always causes adaptation of a trait
‑most important mechanism of evolution in large populations
◉ Genetic drift.
Answer: -has a large effect on allele frequency in small populations/
small effect on large populations
