hmm

You find evidence for strong directional natural selection over 10 generations

on tongue length in a moth species (increasing length across generations) that

feeds on the nectar produced in long nectar tubes of a particular plant species.

You find that there has been no change in the mean or variance in nectar tube

length in the plant species. Has co-evolution occurred? If so, why or if not why

not and what type of evolution, if any, has occurred?

In a population of dogs, the mean head width is 10 cm. You decide that only

dogs on the upper end of the population with a mean head size of 15 cm are

allowed to breed.

What is the selection differential?

Next, you allow only those dogs from the upper end of the distribution with a

mean of 15 cm to breed and their babies, when they grow up show a mean head

size of 12 cm.

What is the response to selection?

Give this, what is the narrow sense heritability of the trait?

THIS IS NOT HOMEWORK - THIS IS A REVIEW!!

Please help me better understand this - it's for an exam. Thank you so much - I appreciate your time!

THIS IS NOT HOMEWORK - THIS IS A REVIEW!!

In a population of dogs, the mean head width is 10 cm. You decide that only

dogs on the upper end of the population with a mean head size of 15 cm are

allowed to breed.

What is the selection differential?

Next, you allow only those dogs from the upper end of the distribution with a

mean of 15 cm to breed and their babies, when they grow up show a mean head

size of 12 cm.

What is the response to selection?

Give this, what is the narrow sense heritability of the trait?

Please help me better understand this - it's for an exam. Thank you so much - I appreciate your time!

For 20 loci each with 2 alleles each:?

How many haplotypes are possible?

How many diploid genotypes are possible?

Your help is greatly appreciated! Thanks

This is a review for a test - not homework!!

For 20 loci each with 2 alleles each:?

How many haplotypes are possible?

How many diploid genotypes are possible?

Your help is greatly appreciated! Thanks

This is a review for a test - not homework!!

You are in charge of estimating the mutation rate in an emerging human virus. You are

given a very old sample collected in 1950 that contains DNA from that virus as well as a

DNA sample of the same virus collected fifty year later, in 2000. You have the complete

genome sequences for both samples. The genome size of this virus is 20,000 base pairs.

There are 10,000 replication events per year. You find 2,000 single base pair differences

between the samples collected in 1950 and 2000. Assume the entire genome is evolving

under neutral expectations.

b. You find a vial that you know was collected prior to 1950, but you do not know the

exact year. Assume that the virus always has the same mutation rate. You sequence the

genome of this virus and find 10,000 single base pair differences between the sample

collected in 1950 an this sample that was collected at the unknown time. When do you

estimate this sample was collected and why?

Your help would be greatly appreciated! thank you

What is the value of H (heterozygosity) for a population of pupfish in Hardy-Weinberg

Equilibrium for a microsatellite locus that has 8 alleles and the following frequencies of

homozygotes in the population: A1A1 = 0.01, A2A2 = 0.01, A3A3 = 0, A4A4 = 0.05,

A5A5 = 0.07, A6A6 = 0.01, A7A7 = 0.02, A8A8 = 0.03?

If you could explain this to me it would really help - this is NOT my homework - I am reviewing for a test!! Thank you

You are in charge of estimating the mutation rate in an emerging human virus. You are

given a very old sample collected in 1950 that contains DNA from that virus as well as a

DNA sample of the same virus collected fifty year later, in 2000. You have the complete

genome sequences for both samples. The genome size of this virus is 20,000 base pairs.

There are 10,000 replication events per year. You find 2,000 single base pair differences

between the samples collected in 1950 and 2000. Assume the entire genome is evolving

under neutral expectations.

a. What is mutation rate on a per-replication and per year basis in the virus (include

units)?

Your help would greatly be appreciated, thank you!! (This is NOT my homework - it is an exam review)

The Galapagos hawk has a polyandrous (one female, many male) mating system, in

which a single female controls a harem of males and is the sole mother of all babies in

that social group, which can contain up to 8 males, but there is only a single baby

produced in each year. In another species, the Swainson’s hawk, a single male and female

pair up and have a single baby in each year.

a. Assuming all else is equal, which species is likely to have the larger Ne and why?

b. Which species will lose heterozygosity more quickly and why?

Thanks!

You find after conducting a genome sequencing study on a population of 1000 humans

that two alleles at two different loci have a D (or LD) value of 1. However, some

detective work shows that the alleles at each locus involved are not on the same

chromosome.

a) Are alleles at these two loci physically linked? Why? (please explain so I understand this better..)

b) Are the alleles in linkage equilibrium or disequilibrium and what is a possible evolutionary mechanism that could explain this pattern?

Your help would be greatly appreciated! Thank you!! (This is not homework - I am studying for an exam)

Two objects at a distance r and 2r rotate around a common point. In order for the objects to maintain a constant angular velocity the object at radius r will have a tangential velocity ____ as/than the object at radius 2r.

A.greater B.less C.the same

Q.2) The object at 2r would have a tangential velocity of ____

A.2rω B.2πω C.rω

Q.3) If the object at radius r rotated twice around the common point it is said to have moved ____

A.π rad B.2π rad C.4π rad

Q.4) How many degrees is π/2 ?

A.180 B.90 C.45

A car is connected to a tree by a length of rope tied tightly. A 115 pound woman steps in the middle of the rope causing it to deflect by 15 degrees.

How much force does the woman apply to the rope?

A) 115 lbs

B) 345 lbs

C)645 lbs

D) 222 lbs

What is the sum of the Xs?

A) 0

B) 0.966

C) 1.932

D) equal

What is the sum of the Ys?

A) 0

B) .966

C) 1.932

D) equal

What is the force applied to the car?

A) 115 lbs

B) 345 lbs

C) 645 lbs

D) 222 lbs

What is the force applied to the tree?

A) 115lbs

B) 345 lbs

C) 645 lbs

D) 222 lbs

Thank you SOOO much!

A car is connected to a tree by a length of rope tied tightly. A 115 pound woman steps in the middle of the rope causing it to deflect by 15 degrees. What are the forces applied to the rope? What is the sum of the x's? What is the sum of the y's the force applied to the car and the force applied to the tree ?

Thank you!

A car is connected to a tree by a length of rope tied tightly. A 115 pound woman steps in the middle of the rope causing it to deflect by 15 degrees. What are the forces applied to the rope? What is the sum of the x's? What is the sum of the y's the force applied to the car and the force applied to the tree ?

Thank you!

A car is connected to a tree by a length of rope tied tightly. A 115 pound woman steps in the middle of the rope causing it to deflect by 15 degrees. What are the forces applied to the rope? What is the sum of the x's? What is the sum of the y's the force applied to the car and the force applied to the tree ?

Thank you!

A car is connected to a tree by a length of rope tied tightly. A 115 pound woman steps in the middle of the rope causing it to deflect by 15 degrees.

Your help will be greatly appreciated :)

A study is done on giving men with osteoporosis human growth hormone with calcium and vitamin D3. This is thought to halt the fall in bone density and help build bone density. Bone density was measured by a continuous Z-score. The study contains a total of 100 patients and is designed so that alpha=0.05, and beta=0.8 for an effect size in which Z changes by 1.5 units between the treatment and the placebo groups. How many patients would they need in the study to make beta=0.8 for change of 0.5 units in Z?

Thank you!

For the following three examples, state:

a) The null hypothesis

b) The alternative hypothesis

1. A highway patrolman issues a blood alcohol test on a driver

2. A public school internet filter blocks suspected pornographic sites from being downloaded by students

3. A ban is proposed on a video game because of data that seems to show that it causes violence in teenagers

For the following three examples, state:

a) The null hypothesis

b) The alternative hypothesis

c) A description of what a type I error looks like in this context

d) A description of what a type II error looks like in this context

1. A highway patrolman issues a blood alcohol test on a driver

2. A public school internet filter blocks suspected pornographic sites from being downloaded by students

3. A ban is proposed on a video game because of data that seems to show that it causes violence in teenagers

Thank you for your help, I really appreciate it

A Randomized Controlled Trial is carried out to determine the effectiveness of a new treatment for a condition. 10 patients are assigned to the treatment group and 10 patients are assigned to an untreated control group. At the end of the trial, 5 untreated patients have died and 1 treated patient has died. State your hypotheses in appropriate form. Use statistics to test these hypotheses. Do you think the

treatment is effective, why?

How do I do this using the binomial coefficient? Please help, thanks!