Subjects
PRICING
COURSES
SIGN IN
Start Free Trial
Spencer B.
Math/Science Tutor for 7 years, Biological Researcher
Tutor Satisfaction Guarantee
SAT II Biology E/M
TutorMe
Question:

Albinism is a recessive condition meaning that heterozygous individuals can carry the gene without showing any sign. Using Hardy-Weinberg, determine the frequency of carriers (heterozygotes) if the frequency of albinos (homozygous recessive) is 0.01

Spencer B.
Answer:

The Hardy-Weinberg equations is as follows, p2 + 2pq + q2 = 1 and p + q = 1 p stands for the frequency of the dominant allele, and q the frequency of the recessive allele. Therefore, p2 is the frequency of homozygous dominant individuals, 2pq is the frequency of heterozygous individuals, and q2 is the frequency of homozygous recessive individuals. It is given that the frequency of homozygous recessive individuals is 0.01, which in terms of the equation means: q2 = 0.01 We can find the frequency of the recessive allele by taking the square root of both sides, solving for q: q = 0.1 From this we can calculate the frequency of the dominant allele by plugging q into the second part of the Hardy-Weinberg equation: p + q = 1 p + (0.1) = 1 p = 0.9 We can now calculate the number of heterozygous individuals (carriers) by finding: 2pq 2(0.9)(0.1) = 0.18 That means that the frequency of carriers for albinism is 0.18

Biology
TutorMe
Question:

What is endosymbiotic theory? Name the major component/organelle of the animal cell that originated through this process.

Spencer B.
Answer:

Endosymbiotic theory is the proposition that some of the organelles unique to Eukaryotes evolved from ancient bacterial cells living within a larger host cell. The two cells had a mutually beneficial relationship in which the larger cell provided a home for the smaller cell and in return the smaller cell helped the host cell process energy. The mitochondria of animals’ cells originated through this process

Algebra
TutorMe
Question:

Given the system of equations: 2x – y2 = -3y 4x + 10y = 0 Find x and y:

Spencer B.
Answer:

To start, solve the second equation for 2x, in terms of y: 4x + 10y = 0 - 10y -10y 4x = -10y /2 /2 2x = -5y Substitute -5y for 2x into the first equation and solve for y: 2x – y2 = -3y (-5y) – y2 = -3y +5y +5y - y2 = 2y /y /y -y = 2 y = -2 Now that you know y, plug it into your equation for x: 2x = -5y 2x = -5(-2) 2x = 10 x = 5 Solution: x = 5 y = -2

Send a message explaining your
needs and Spencer will reply soon.
Contact Spencer
Ready now? Request a lesson.
Start Session
FAQs
What is a lesson?
A lesson is virtual lesson space on our platform where you and a tutor can communicate. You'll have the option to communicate using video/audio as well as text chat. You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.
How do I begin a lesson?
If the tutor is currently online, you can click the "Start Session" button above. If they are offline, you can always send them a message to schedule a lesson.
Who are TutorMe tutors?
Many of our tutors are current college students or recent graduates of top-tier universities like MIT, Harvard and USC. TutorMe has thousands of top-quality tutors available to work with you.