BIO 1108 exam 1 | UPDATED Questions with 100% Verified
Answers
Q1: evoloution
A: change in allele frequencies in a population across generations
Q2: alleles
A: different versions of a gene
Q3: How does genetic variation arise?
A: through mutation and recombination
Q4: mutation
A: changes in the DNA sequence
Q5: recombination
A: shuffling of DNA, creating new alleles in gametes of sexually reproducing organisms
Q6: genotype frequency
A: Proportion of a specific genotype in a population.
, Q7: allele frequency
A: Proportion of a specific allele in a population.
Q8: What does it mean when there are no changes in allele frequency?
A: no evolution
Q9: HardyWeinberg equilibrium
A: A condition that occurs when a population is not evolving
Q10: What is needed for the HWE?
A: no selection, no mutations, no migration, large population, random mating. very few
populations meet the conditions for the HWE.
Q11: natural selection occurs when
A: 1. there is variation within a population
2. the variation is heritable
3. resources are low driving competition
4. as a result mortality occurs (strongest survive and pass down traits to offspring)
Q12: what are the two observations of natural selection
A: 1. more offspring with favorable traits in the next generation (evolution)
2. more survival of individuals with certain traits (fitness)
Q13: fitness
A: how well an organism is able to survive and reproduce leaving genes in the next
generation
Q14: how does natural selection increase the fitness of a population
A: Because organisms with advantageous traits are more likely to survive and reproduce
Answers
Q1: evoloution
A: change in allele frequencies in a population across generations
Q2: alleles
A: different versions of a gene
Q3: How does genetic variation arise?
A: through mutation and recombination
Q4: mutation
A: changes in the DNA sequence
Q5: recombination
A: shuffling of DNA, creating new alleles in gametes of sexually reproducing organisms
Q6: genotype frequency
A: Proportion of a specific genotype in a population.
, Q7: allele frequency
A: Proportion of a specific allele in a population.
Q8: What does it mean when there are no changes in allele frequency?
A: no evolution
Q9: HardyWeinberg equilibrium
A: A condition that occurs when a population is not evolving
Q10: What is needed for the HWE?
A: no selection, no mutations, no migration, large population, random mating. very few
populations meet the conditions for the HWE.
Q11: natural selection occurs when
A: 1. there is variation within a population
2. the variation is heritable
3. resources are low driving competition
4. as a result mortality occurs (strongest survive and pass down traits to offspring)
Q12: what are the two observations of natural selection
A: 1. more offspring with favorable traits in the next generation (evolution)
2. more survival of individuals with certain traits (fitness)
Q13: fitness
A: how well an organism is able to survive and reproduce leaving genes in the next
generation
Q14: how does natural selection increase the fitness of a population
A: Because organisms with advantageous traits are more likely to survive and reproduce
