Ntesfaio Week 2
Contents
Naomi Tesfaiohannes Week 2 Assignment
Protocol
Part IV. Evolution
The Evolution tab uses a population size of 100 flowers that contribute to the gene pool for the next generation based on fitness.
Question A
Selecting for red
A4) Prediction: What should happen to the number of red and the number of white flowers after several generations with this selection?
By making the fitness of red the highest (10) and all other fitnesses 0 the number of red flowers should dominate and the number of white flowers should be little to none. There should definitely be no other color shown.
A6) Result: What happens to the counts of red and white flowers as you stimulate more generations? Roughly, how many generations does it take to get to pure red. Some all-red can still have some white offspring (why)?
Number of white and red by generational stimulate:
1 stimuate: 27 white and 73 red
2 stimulate: 20 white and 79 red
3 stimulate: 19 white and 81 red
At 35 generations there were 9 white and 91 red. This is roughly the number of generations it takes to get pure red. All red generations can also have white offspring since white can be autosomal recessive and if one recessive genes is taken from each parent then the recessive trait can show.
Question B
Selecting for White
B4) Prediction: What should happen to the number of red and white flowers after several generations with this selection?
With the selection being white (10) and all other colors (0) the white flower has the greatest fitness and should dominate the grid.
B6) Result: What happens to the counts of red and white flowers as you stimulate more generations? Roughly how many generations does it take to get to pure white?
The number of white significantly increases by large amounts when selecting for white
With 1 stimulate there were 95 white flowers and 5 red.
At 6 generations there were 100 white and 0 any other color.
Why does it take more generations to get to pure red than it does to get to pure white?
Question C
C3) Is this population at Hardy-Weinberg Equilibrium?
Genotype Number #R's #r's
RR 0 0 0
Rr 100 50 50
rr 0 0 0
Frequency of R (p): 50
Frequency of r (q): 50
C5) Calculate the genotype frequency expected at HWE:
Frequency of RR= p^2=
Frequency of Rr= pq=
Frequency of rr=q^2=
Is the population at HWE? Why or why not?
C7) Run one generation only. Is the population at HWE?
33 white and 67 red.
RR 23 Rr 44 33 rr
C9) With fitness set to 10 for red what should happen to p and q?
There should be more p than q present on the world grid
C11) Result: Calculate p and q as you did in part (d)
Generation 7
88 red and 12 white
Genotype Number #R's #r's
RR 40
Rr 48
rr 12
Frequency of R (p)=
Frequency of r (q)=
C12) Does the result match your prediction? Why or why not?
Electronic Lab Notebook
Acknowledgements
My homework partner this week was Iliana Crespin. We sat together in the class periods to discuss the week 2 assignment.
"Except for what is noted above, this individual journal entry was completed by me and not copied from another source."
Ntesfaio (talk) 11:44, 10 September 2019 (PDT)
