Q1.5. Will the allele frequencies in the breeding pens tend to move toward the frequency in the larger field population? Yes, because the breeding pen populations were established from the field population. No, because the breeding pen populations are now independent of the field population. Q1.6. What value will the allele frequencies in the pens tend to move toward? 0.25 0.5 0.75 It's impossible to say. Q1.7. Will allele frequencies in different pens all do the same thing, or will something different happen in each one? The frequencies in half the pens will increase, and the frequencies in the other half will decrease. The frequencies in the pens will all do different things, changing in random directions. The frequencies in all pens will increase or decrease according to how the field frequency changes.
Added by Victoria L.
Close
Step 1
5. The allele frequencies in the breeding pens may not necessarily move toward the frequency in the larger field population. This is because the breeding pen populations are now independent of the field population and are subject to their own genetic drift and Show more…
Show all steps
Your feedback will help us improve your experience
John Nicolle and 55 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
For each situation, predict whether the allele frequency is likely to increase or decrease in the population due to natural selection. 1. A dominant allele is beneficial to individuals that carry it. a. The allele frequency will increase steadily until the allele becomes fixed. b. The allele frequency will increase rapidly, but the allele will not become fixed. c. The allele frequency will decrease until allele is lost. 2. A dominant allele is deleterious to individuals that carry it. a. The allele frequency will decrease until allele is lost from the population b. The allele frequency will increase rapidly, but the allele will not become fixed. c. The allele frequency will decrease, but the allele will remain in population. 3. A recessive allele in a population with some homozygous recessive individuals is beneficial to individuals carrying the allele. a. The allele frequency will increase steadily until the allele becomes fixed. b. The allele frequency will increase rapidly, but the allele will not become fixed. c. The allele frequency will decrease, but the allele will remain in population. 4. A recessive allele in a population with some homozygous recessive individuals is deleterious to individuals carrying the allele. a. The allele frequency will increase steadily until the allele becomes fixed. b. The allele frequency will decrease, but the allele will remain in population. c. The allele frequency will decrease until allele is lost from the population. 5. An additive allele is beneficial to individuals that carry it. a. The allele frequency will decrease until allele is lost. b. The allele frequency will increase steadily until the allele becomes fixed. c. The allele frequency will increase rapidly, but the allele will not become fixed. 6. An additive allele is deleterious to individuals that carry it. a. The allele frequency will decrease until allele is lost. b. The allele frequency will increase rapidly, but the allele will not become fixed. c. The allele frequency will decrease, but the allele will remain in population.
Farhan A.
Sri K.
A scientist is studying two large populations of deer that are centralized in nearby forests. She takes blood samples from all of the deer in each population and records in how many individuals she finds allele A. She then computes the frequency of the alleles in each population. The frequencies observed over five years are shown in the tables below. $\begin{array}{|c|c|}\hline & {\text { Population A }} \\ \hline \text { Year } & {\text { Allele $\mathbf{A}$} \\ { \text {Frequency} }} & {\text { Allele $\mathbf{B}$} \\ { \text {Frequency} }} \\ \hline 1 & {0.69} & {0.20} \\ \hline 2 & {0.71} & {0.29} \\ \hline 3 & {0.73} & {0.27} \\ \hline 4 & {0.75} & {0.25} \\ \hline 5 & {0.84} & {0.19} \\ \hline 6 & {0.84} & {0.16} \\ \hline\end{array}$ $\begin{array}{|c|c|}\hline & {\text { Population B }} \\ \hline \text { Year } & {\text { Allele $\mathbf{A}$} \\ { \text {Frequency} }} & {\text { Allele $\mathbf{B}$} \\ { \text {Frequency} }} \\ \hline 1 & {0.00} & {1.00} \\ \hline 2 & {0.00} & {1.00} \\ \hline 3 & {0.10} & {0.90} \\ \hline 4 & {0.16} & {0.84} \\ \hline 5 & {0.21} & {0.79} \\ \hline 6 & {0.25} & {0.75} \\ \hline\end{array}$ Which forms of evolution are most likely occurring in populations A and B? Explain your answer. a. In population A, genetic drift is likely occurring, causing allele A to become more prevalent than allele B. In population B, mutation apparently occurred, introducing allele A to population B. Allele A also appears to be increasing due to genetic drift in population B. b. In population A, natural selection is likely occurring, with allele A being favored over allele B. In population B, gene flow apparently occurred, allowing allele A to become established in population B. Allele A also appears to be favored by selection in population B. c. In population A, gene flow apparently occurred, allowing allele B to become established in population A. Allele A also appears to be favored by selection in population A. In population B genetic drift is likely occurring, causing allele A to become more prevalent than allele B. d. In population A, mutation apparently occurred, introducing allele B to population A. Allele A also appears to be increasing due to genetic drift in population A. In population B natural selection is likely occurring, with allele A being favored over allele B.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD