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what the remaining ratio alleles the remaining rat

What the remaining ratio alleles the remaining ratio red blue

Lab 8 Population Genetics

BIO101L

Student Name: CJN

constitute only a portion of this total).

 There are approximately 10,000 genes in the mammalian genome.

1,000,000,000

2. What proportion (%) of the total genome does this represent?

1 in 90,000

Note: In the following experiments on gene pool, gene frequency, and genetic diversity; assume there

2.

Beaker #2 Population Composition
# of Individuals % of Population
Yellow Beads Green Beads Total Yellow Beads Green Beads Total
13 7 20 65 35 100

3. What can you say about the genetic variation between these populations?

Experiment 2: Genetic Drif

Beaker #1 Survivors
Trial
% of Population
Blue Beads
Red Beads
Total
12 13 25 42 58 100
2
11 14 25 29 71 100
15 10 25 38 62 100
4
7 18 25 73 27 100
13 12 25 52 48 100

Post-Lab Questions
1. What observations can you make regarding the gene pool and gene frequency of the surviving

Yes, the do vary between populations. Based on the varying survivors (from each beaker) I see no obvious pattern(s) showing one population surviving more consistently than any other. The one thing we can see is that the size of the parent population and its original gene pool have the most effect on the variations.

3. What observations can you make about the genetic variation between the parent and surviving

BIO101L

One observation that I am able to make is that the variation size continues to grow thereby becoming more unpredictable.

Experiment 3: Stochastic Events

Beaker #2 Founders
Trial
% of Population
Green Beads
Yellow Beads
Total
2 3 5 40 60 100
2
2 3 5 40 60 100
1 4 5 20 80 100
4
3 2 5 60 40 100
4 1 5 80 20 100

BIO101L

An observation that I can make is that the founding populations were roughly equal similarly with the parent populations.

4. Suppose you have a population of 300 butterflies. If the population experiences a net growth of

24 butterflies survive. What percent does the colony decrease by? The colony decreases by 84% as there are only 16% remaining.

Experiment 4: Natural Selection

The distribution of phenotypes changed to favor the blue beads with only a small number of red beads remaining.

4. Is there a selective advantage or disadvantage for the red and/or blue phenotypes? There is an advantage for the blue beads and a disadvantage for the red beads.

Lab 8 Population Genetics

BIO101L
6.

Assume that you live in a country with 85 million people that consistently experiences an

Generation 5 Generation 6 Generation 7
#
#
#
1
Ss Ss
1
SS
Ss
2
SS Ss
3
Ss Ss
3
SS
Ss
4
Ss SS
5
SS Ss
5
SS
Ss
6
SS Ss
7
ss SS
7
Ss
Ss
8
Ss ss
9
Ss SS
9
Ss
Ss
10
Ss ss

Lab 8 Population Genetics

BIO101L

3. Given enough generations, would you expect one of these alleles to completely disappear from the

population? Why or why not?

ancestry. How would you explain this?

The reason that both alleles are still present is because the dominate allele of red protects the blue from dying and the fact that crossing hetero with homo always results in two homo and two hetero.

Lab 8 Population Genetics

BIO101L

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