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
shutvik [7]
3 years ago
9

In 1814, 15 British colonists founded a settlement on Tristan da Cunha, a group of small islands in the Atlantic Ocean, midway b

etween Africa and South America. One of the early colonists apparently carried a recessive allele for retinitis pigmentosa, a progressive form of blindness that afflicts homozygous individuals. Of the founding colonists' 240 descendants on the island in the late 1960s, 4 had retinitis pigmentosa (rr). The frequency of the allele that causes this disease is ten times higher on Tristan da Cunha than in the populations from which the founders came. Calculate the frequency of the r allele in the original population of 15 colonists and in the 240 descendants. Please show calculations, Thanks!
Biology
1 answer:
serg [7]3 years ago
3 0

Answer:

Frequency of the allele "r"causing  the disease on Tristan da Cunha= 1.67 %

Frequency of the allele "r"causing  the disease in the original population of 15 colonists = 16.7%

Explanation:

Frequency of the allele "r"causing  the disease on Tristan da Cunha

Given -

Out of 240 descendants on the island, 4 had retinitis pigmentosa (rr).

As per Hardy Weinberg's equllibrium equation

The frequecy of recessive individual in a given population is represented by q^2

And q represents the frequency of allele r

So, in this case q is equal to

\frac{4}{240} * 100\\

= 1.67 %

Frequency of the allele "r"causing  the disease in the original population of 15 colonists

As it is given in the question statement , the frequency of allele "r"causing  the disease in the original population of 15 colonists is ten times the frequency of the allele "r"causing  the disease on Tristan da Cunha

i.e

1.67 * 10\\

= 16.7%

You might be interested in
Which of the following statements about using geothermal energy is not true?
sammy [17]

Answer:

d

Explanation:

because I dont think you can renew the sun

6 0
3 years ago
Read 2 more answers
Pill bugs" or "sow bugs", often found under rocks and logs in moist places, have the ability to roll up into a ball when disturb
OleMash [197]
They do not have a distinct head and thorax but a fused version of the two called a cephalothorax. That's one of the major differences between insects and crustaceans, both being subgroups of arthropods. 
8 0
3 years ago
The four major functions of hormones are?
Hoochie [10]
  1. <em>Estrogen.</em>
  2. <em>Progesterone.</em>
  3. <em>Prolactin.</em>
  4. <em>Testosterone.</em>

<em />

<em>A/N</em><em>: hope this help  </em>

7 0
3 years ago
How do organelles contribute to efficiency in eukaryotic cells
Mazyrski [523]
The two groups differ in the composition of the cell wall and the lipids in the cell membrane. 3. ... Organelles contribute to efficiency in eukaryotic cells because they concentrate the biochemicals needed for chemical reactions so that the reactions proceed more rapidly.
6 0
2 years ago
What important gas did stromatolites (cyanobacteria) release into the atmosphere?
Tju [1.3M]
Cyanobacteria released OXYGEN into the atmosphere through photosynthesis
8 0
3 years ago
Other questions:
  • Match each phylum or class to its correct characteristic.
    6·1 answer
  • Photosynthetic organisms produce sugar molecules from radiant energy and inorganic substances. These sugar molecules are then us
    14·2 answers
  • A force is a ___ quantity.<br><br> -scalar<br> -victor<br> -diagonal
    9·1 answer
  • A population of 100 butterflies living on an acre of land loses three-quarters of its members when a sudden freeze in the spring
    7·1 answer
  • Which statement is true for both incomplete and complete digestive systems?
    13·1 answer
  • Which of the following is a specialist species?
    8·2 answers
  • If one DNA strand reads CCGTAATGCAT, what will be the sequence of the complimentary strand?
    5·1 answer
  • COLOR THEME
    12·1 answer
  • Why can’t penguin fly?
    5·2 answers
  • The concept of ""working against resistance"" is a key principle of
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!