AP BIO Ch 23 2025/2026 Exam
Questions and Correct Answers | New
Update
What is microevolution? - 🧠ANSWER ✔✔Change in allele frequencies in a
population over generations
What are the three main mechanisms that can cause changes in allele
frequency? - 🧠ANSWER ✔✔Natural selection, genetic drift, and gene flow
Which is the only mechanisms that is adaptive or improves the match
between organisms and their environment? - 🧠ANSWER ✔✔Natural
selection
, Discrete characters - 🧠ANSWER ✔✔classified on an either-or basis. Purple
phenotype in pea plants, or white.
Quantitative characters - 🧠ANSWER ✔✔heritable variation that varies on a
continuum
Two ways of measuring genetic variation in a population? - 🧠ANSWER
✔✔Gene variability, nucleotide variability
What external factors might produce a cline? - 🧠ANSWER
✔✔Temperature, climate
Why does the existence of a cline suggest natural selection? - 🧠ANSWER
✔✔Because if there were no natural selection, there would be no reason to
see a correlation between allele frequency and environmental variables
What is the ultimate source of new alleles? - 🧠ANSWER ✔✔Mutation
What occurs in a point mutation? - 🧠ANSWER ✔✔A change of one base in
a gene.
What is translocation and how could it be beneficial? - 🧠ANSWER ✔✔It is
the movement of a part of 1 chromosome to a different chromosome and
this can link DNA segments which can result in a positive affect
Questions and Correct Answers | New
Update
What is microevolution? - 🧠ANSWER ✔✔Change in allele frequencies in a
population over generations
What are the three main mechanisms that can cause changes in allele
frequency? - 🧠ANSWER ✔✔Natural selection, genetic drift, and gene flow
Which is the only mechanisms that is adaptive or improves the match
between organisms and their environment? - 🧠ANSWER ✔✔Natural
selection
, Discrete characters - 🧠ANSWER ✔✔classified on an either-or basis. Purple
phenotype in pea plants, or white.
Quantitative characters - 🧠ANSWER ✔✔heritable variation that varies on a
continuum
Two ways of measuring genetic variation in a population? - 🧠ANSWER
✔✔Gene variability, nucleotide variability
What external factors might produce a cline? - 🧠ANSWER
✔✔Temperature, climate
Why does the existence of a cline suggest natural selection? - 🧠ANSWER
✔✔Because if there were no natural selection, there would be no reason to
see a correlation between allele frequency and environmental variables
What is the ultimate source of new alleles? - 🧠ANSWER ✔✔Mutation
What occurs in a point mutation? - 🧠ANSWER ✔✔A change of one base in
a gene.
What is translocation and how could it be beneficial? - 🧠ANSWER ✔✔It is
the movement of a part of 1 chromosome to a different chromosome and
this can link DNA segments which can result in a positive affect
