Worksheet 5 - BIOL-4330-01-Fall2022

pdf

School

South Texas College *

*We aren’t endorsed by this school

Course

4330

Subject

Biology

Date

Feb 20, 2024

Type

pdf

Pages

Uploaded by PresidentManateePerson1056

Nathalie Gamez BIOL – 4330-01-Fall2022 Worksheet 5 Evolution Within and Between Populations 1. AA: 40 Aa: 80 aa: 120 What is the genotype frequency of this population? AA: 40/240 = 0.167 → 1/6 Aa: 80/240 = 0.333 → 1/3 aa: 120/240 = 0.500 → ½ What is the allele frequency? p: 2(40) + 80 = 160/480 = 0.33333 q: 2(120) + 80 = 320/480 = 0.66666 Is this population in Hardy Weinberg equilibrium? . ? 2 + 2?? + ? 2 = 1 0. 333 2 + 2(0.333)(0.666) + 0.666 2 = 1 0.11 + 0.44 + 0.44 = 1 This is not in Hardy Weinberg Equilibrium.

Assuming evolutionary forces stay the same, what would you expect the genotype frequencies of the next generation to be? Assuming evolutionary forces stay the same, you would expect the genotype frequencies of the next generation to be either stay the same or it could change, and the type of change will help indicate what type of evolutionary forces is acting on this population. 2. AA: 40 Aa: 320 aa: 640 What is the genotype frequency of this population? AA: 40/1000 = 0.04 → 1/25 Aa: 320/1000 = 0.32 → 8/25 aa: 640/1000 = 0.64 → 16/25 What is the allele frequency? p: 2(40) + 320 = 400/2000 = 0.2 q: 2(640) + 320 = 1600/2000 = 0.8 Is this population in Hardy Weinberg equilibrium? . ? 2 + 2?? + ? 2 = 1 0. 2 2 + 2(0.2)(0.8) + 0.8 2 = 1 0.04 + 0.32 + 0.64 = 1

Yes, this population is in Hardy Weinberg equilibrium. Assuming evolutionary forces stay the same, what would you expect the genotype frequencies of the next generation to be? Assuming evolutionary forces stay the same, you would expect the genotype frequencies of the next generation to be stay the same/unchanged unless there ’ s change (if at Hardy Weinberg Equilibrium). 3. A population of plants with AA: 250 Aa: 500 aa: 250 What is the genotype frequency of this population? AA: 250/1000 = 0.25 → 1/4 Aa: 500/1000 = 0.5 → 1/2 aa: 250/1000 = 0.25 → 1/4 What is the allele frequency? p: 2(250) + 500 = 1000/2000 = 0.5 q: 2(250) + 500 = 1000/2000 = 0.5 Is this population in Hardy Weinberg equilibrium? . ? 2 + 2?? + ? 2 = 1 0. 5 2 + 2(0.5)(0.5) + 0.5 2 = 1

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

0.25 + 0.5+ 0.25= 1 Yes, this population is in Hardy Weinberg Equilibrium. 4. Now, assume the gene above determines the color of flowers in this plant in an incomplete dominance pattern such that AA individuals have red flowers, Aa individuals have pink flowers, and aa individuals have white flowers. If there is a change in pollinators so that a hover fly pollinates only the red flowers, a bee pollinates only the pink flowers and a moth pollinates only the white flowers, what would you expect the genotype frequency to be in the subsequent generation? (Note: Usually changes are not this rapid or extreme, but this will illustrate the possible changes that can occur due to non-random mating) 5. What is the long-term outcome if this type of pollination persists? The generations of when the red flowers mates with red will represent themselves in the population along with the white flowers. However, the pink flowers will be very rare and eventually would go extinction as when the pink flowers mates with pink they ’ll lose half of the resulting offspring to the other phenotypes. This is sort of an assortative mating – non-random mating – that could result in speciation events. Thus, the long-term outcome is a continued loss of pink flowers and eventual segregation of population into two types, red and white flowers. 6. Now, assume the gene above determines the color of flowers but in a classic dominant recessive pattern such that AA and Aa individuals have red flowers and aa individuals have white flowers. The hover fly still pollinates only the red flowers the moth pollinates only the white Generation 1 250 500 250 Generation 2 250 +125 = 375 250 250 + 125 = 375

flowers and the bee is no longer a pollinator for this species. What would you expect the genotype frequency to be in the subsequent generation? AA x AA: 1/9 AA 83 Aa x Aa: 1/9 AA 83 2/9 Aa 166 aa 1/9 83 AA x Aa: 2/9 AA 166 2/9 Aa 166 AA 332 332 7. Now, assume the gene above still determines the color of flowers in a classic dominant recessive pattern such that AA and Aa individuals have red flowers and aa individuals have white flowers. The hover fly still pollinates only the red flowers, but the moth is wiped out by an evil land developer so that there is no longer any pollinators for the white flowered plants, what would you expect the genotype frequency to be in the subsequent generation? 8. Did we completely remove the white flower trait from the population? If not, why? Would it be possible to remove this trait from the population given the current genetics and pollinators remain unchanged? If so, would it be a long or a short process? No, we didn ’ t completely remove the white flower trait from the popuation because we still have some heterozyotes in every generation. As the trend continues, every generation is going to lose a few of the alleles when paired together. Thus, the allele becomes rare in the population Generation 1 250 500 250 Generation 2 333 333 333 Generation 1 250 500 250 Generation 2 333 333 0

and the pairing together chance becoems smaller. The process to remove the trait from the population given the current genetics and pollinators is going to be slow – a very long process to remove a recessive allele that is detrimental. 9. How would the situation change if the hover fly was the pollinator that was removed instead of the moth? If the hover fly was the pollinator that was removed instead of the moth, then there would immediately removal of all of the big alleles from the population. In a single generation (only takes one generation to completely remove a dominant allele that is detrimental), the red trait would be extinct and all of the flowers would be white .

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Related Documents

Antibiotic Resistance.docx

Primary Production.docx

Zebrafish & Caffeine S24 version.docx

Week 6 Worksheet (2).docx

Week 8 Worksheet 10.10.23.docx

Bio week 3 ws 3 .docx

Key BIO 182 Practice Exam 1.pdf

Lab 3 Payton Rodgers.pdf

ECOL 100 M04 Study Guide.docx

ECOL100 M01 Study Guide.docx

Week 4 Soap Note.pdf

NSG 6430 Week 9 Soap Note Meissner D.pdf

Recommended textbooks for you

Biology: The Dynamic Science (MindTap Course List)

Biology

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Cengage Learning

Biology Today and Tomorrow without Physiology (Mi...

Biology

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cengage Learning

Biology 2e

Biology

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:OpenStax

Human Heredity: Principles and Issues (MindTap Co...

Biology

ISBN:9781305251052

Author:Michael Cummings

Publisher:Cengage Learning

Human Biology (MindTap Course List)

Biology

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cengage Learning

Biology (MindTap Course List)

Biology

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Cengage Learning

SEE MORE TEXTBOOKS

Recommended textbooks for you

Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Human Biology (MindTap Course List)
Biology
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning