1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kumpel [21]
3 years ago
9

14). During the early 1700’s, a small group of pacifist Protestants fled Germany to avoid religious persecution. This group, the

Dunkers, settled in the farmland of eastern Pennsylvania and has been relatively isolated from other groups of people living in the area (they have strict rules about marriage outside of the group). The original group was comprised of 50 families.
The current Dunker population is genetically distinct from the rest of the United States (and modern Germany) in terms of the ABO blood group system. In the Dunker population, the frequency of the I A allele is .30 (30%) and the frequency of the O blood type is .16 (16%). In the general US and German population the frequency of the I A allele is .40 and the frequency of the O blood type is .25 (25%).
a). What are the frequencies of the I B and i alleles in both populations? Show your work.
b). Use your knowledge of the founder effect to explain the differences in ABO blood group allele frequencies between the 2 populations and indicate whether or not this is an example of adaptive evolution.
Biology
1 answer:
abruzzese [7]3 years ago
6 0
A) In the Dunker population, the frequency of IB allele is 0.3 and the frequency of i allele is 0.4. In the general population, the frequency of IB allele is 0.1 and t<span>he frequency of i allele is 0.5.
</span>
If:
I^{A} - <span>the frequency of IA allele
</span>I^{B} - <span>the frequency of IB allele
</span>i - t<span>he frequency of i allele

Then:
</span>I^{A} I^{A} + <span>I^{A} i - the frequency of individuals with A blood type
</span>I^{B} I^{B} + <span>I^{B} i - the frequency of individuals with B blood type
</span>ii <span>- the frequency of individuals with O blood type
</span>
Let's first take a look on the Dunker population:
I^{A} = 0.3
ii=0.16&#10;

<span>Since there is only one possible genotype for O individuals - ii - the frequency of the allele i is square root of the frequency of O individuals:
</span>i= \sqrt{ii}
⇒ i =  \sqrt{0.16}
⇒ i=0.4

Now, we have the frequencies of two alleles (I^{A} and i). To calculate the frequency of I^{B}<span> allele, we will use the formula:
</span>I^{A} + I^{B} + i = 1
⇒ I^{B} = 1- I^{A} - i
⇒ I^{B} = 1-0.3-0.4
⇒ I^{B} = 0.3

Now, in the general population:
I^{A} = 0.4
ii=0.25

<span>Similarly to the work for the Dunker population:
</span>i= \sqrt{ii}
⇒ i = \sqrt{0.25}
⇒ i=0.5

I^{A} + I^{B} + i = 1
⇒ I^{B} = 1- I^{A} - i
⇒ I^{B} = 1-0.4-0.5
<span>⇒ I^{B} = 0.1
</span>


b) A founder effect is a result of geographical separation of a few individuals from the original population. Those founding individuals will form a new population. The Dunker population was not only geographically separated, but also genetically. The group interbreeding was present resulting in increasing those allele frequencies that were the most common in the founding population. In this case, the most individuals from the founding population had B blood type.
You might be interested in
Musculo que ayuda a la extensión de la rodilla
kirill [66]

Answer:

creo que la respuesta es cuádriceps femoral

8 0
2 years ago
Which does not describe a cause of the Spanish-American War in 1898? A. Americans believed that the Spanish had sunk the battles
Ira Lisetskai [31]
<span>Spanish authorities in Cuba were accused of atrocities against the people.</span>
6 0
3 years ago
Read 2 more answers
The seeds of ___________ are protected in some type of fruit.<br>A.angiosperms<br>B.gymnosperms
Natalka [10]

Answer:

a

Explanation:

Because it mom said so.

5 0
3 years ago
A goox conductor of heat is
Leokris [45]

Answer:

The answer is B

Explanation:

8 0
3 years ago
How to plants obtain more sunlight
Volgvan
The correct answer is:      They lean towards the light 
5 0
3 years ago
Read 2 more answers
Other questions:
  • The process by which water enters deep into the geosphere is ?
    9·1 answer
  • What is a chemical element?
    13·2 answers
  • To decrease the risk of neural tube defects, women who are capable of becoming pregnant are urged to consume at least 400 microg
    15·1 answer
  • if a certain tissue of the body needs more energy, which organelle is more likely to abundant in the cells of this tissue? eluci
    11·1 answer
  • ​Which cellular component is common to all cell types?
    6·1 answer
  • What transport method do you think the Golgi apparatus uses to ship packages of proteins out of the cell?
    12·1 answer
  • What are the correct answers?
    8·1 answer
  • 7. What is the relationship between the amount of greenhouse gasses in the atmosphere and the average global temperature
    13·1 answer
  • The sun of all possible traits that new offspring of a species could inherit is known as the
    7·1 answer
  • The best legal defense for an EMT is *
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!