Questions
Match the type of selection with the example. **Why is each its respective match?** Directional Selection...

Match the type of selection with the example. **Why is each its respective match?**

Directional Selection Stabilizing Selection
Disruptive Selection Negative Frequency Dependent Selection

A) Squirrels that learn fastest have the most offspring

B) Squirrels feed on acorns or birdseed. When most squirrels feed on acorns, those that eat birdseed have the highest fitness (and vise versa)

C) Long ears attract the most mates. Short ears improve survival in the winter. Medium sized ears provide neither benefit.

D) Squirrels that have very long tails are captured by predators. Squirrels that have very short tails lose their balance

In: Biology

If an incompatible transfusion is given, a) what is the problem in terms of antigens and...

If an incompatible transfusion is given,

a) what is the problem in terms of antigens and antibodies?

b) describe what happens to the incompatible donated cells and how this is potentially fatal.

In: Biology

Knowing what you know about plant vascular systems, read the Following 5 ideas, and for each...

Knowing what you know about plant vascular systems, read the

Following 5 ideas, and for each tell me:

1. Is it a good or bad idea?

2. Why is it a good or a bad idea?

3. What is another way to achieve what the idea is attempting?

Requirements

Good or bad idea? Correctly identifies what about the idea is good or bad.

Why? Explanation of reasoning is factual, logical, and detailed.

Alternative idea: Correctly utilizes knowledge of plant vascular systems

1. Carly bought a bouquet of flowers for their boyfriend. To keep them fresh, they

decide to put the bouquet in a dark place.

2. Megan wants to hang a clothesline between two apple trees in her backyard, but she

doesn’t want to kill them and lose the ability to harvest their apples. Her plan is to

screw hooks into each tree trunk for attaching the clothesline.

3. It’s the middle of summer. It hasn’t rained for weeks. It’s hot and dry outside. Tim is

worried that the squash plants in his garden are suffering in the heat, so he decides

to set up a big electric fan to cool them off.

4. Tim is back in the garden. It’s still hot and dry. This time, he’s worried about his

wilting tomato plants. He remembers that in the grocery store, they mist the produce

regularly to keep it fresh. He figures that soaking his whole tomato plants under

water for a while would be even better.

5. Chun lee wants to grow a patch of lush, gorgeous moss. She has some moss, but it

looks kind of dry and not very green. She remembers that in the grocery store, they

mist the produce regularly to keep it fresh. She figures that soaking the moss under

water for a while would be even better

In: Biology

1) A breeder performed a testcross to find out if his male dog was a purebred...

1) A breeder performed a testcross to find out if his male dog was a purebred black. He got one brown puppy and seven black puppies, did he have the purebred? (explain)
What was the genotype of the female dog he used in test cross (BB), (Bb), or (bb)? (explain)

2) Given the description of an inherited disorder (including a pedigree) which of the following shows the probable mechanism of inheritance of this color? (Autosomal recessive, autosomal dominant X-linked recessive, X-linked dominant)

In the example below, determine the possible genotype of Elizabeth Ed

3)The recessive gene for hemophilia is located on X chromosome so why more males have hemophilia than females?

4)Palomino horses are known to be caused by the interaction of two different genes. The allele C in the homozygous condition produces a chestnut, or reddish color, horse. The allele c produces a very pale cream color, called cremello, in the homozygous condition. The palomino color Cc is caused by the interaction of both the chestnut and cremello alleles. Which of the following shows the probable mechanism of inheritance of this color? (autosomal recessive, autosomal dominant, X-linked recessive, co-dominant, incomplete dominant)

In: Biology

Q a) a spreadsheet of the flow to the brain from the liver and from the...

Q a) a spreadsheet of the flow to the brain from the liver and from the brain to the liver - every step how the blood flows in detail.

a) Blood flow from brain to liver

b) blood flow from liver to brain

c)How do vertebral arteries connect brain and the liver? (special emphasis on the blood flow between liver and brain)

(I want full detail of it with diagram , flow sheets and full explanation. I have asked this question 2 times before but got lame answers everytime)

In: Biology

1a) What are the differences between biological replicates and technical replicates? Explain. What are the appropriate...

1a) What are the differences between biological replicates and technical replicates? Explain. What are the appropriate applications for each?

1b) Explain why statistical analysis of whole genome expression data (e.g., fpkm or tpkm from RNA-seq data) require using different criteria for statistical significance between experimental and control samples than analyzing differences in expression of a single gene (e.g., ΔCt or ΔΔCt values from RT-qPCR) ?

1c) How have biologists addressed the concerns of part b?

In: Biology

The RY13 strain of the bacteria E. coli makes the restriction enzyme EcoR I, which cuts...

The RY13 strain of the bacteria E. coli makes the restriction enzyme EcoR I, which cuts at the sequence GAATTC. this occurs thousands of time in a full chromosome. Why doesn’t the enzyme cut the chromosome into tiny bits, killing the bacterium?

In: Biology

What is the ITCZ and what is its influence in tropical rainfall?

What is the ITCZ and what is its influence in tropical rainfall?

In: Biology

how and dumpy interact such that flies who are homozygous for the dumpy LOF mutation (dp)...

how and dumpy interact such that flies who are homozygous for the dumpy LOF mutation (dp) and heterozygous for the complete LOF mutation of how (h-) have wild type wings (normal length).

Mutants when dealing with only one gene (wildtype/normal phenotypes are dominant to mutant phenotypes):

dp/dp = truncated (short) wings

h-/h- = dies when trying to exit pupae

Mutants with the two genes interacting (wildtype/normal phenotypes are dominant to mutant phenotypes; so if there is even one dp+ allele they will have wildtype/normal length wings):

dp h+/ dp h+ = truncated wings that can fold down

dp h+ / dp h- = wild type wings (can fold down and are normal length)

dp h- / dp h - = dies when trying to exit pupae

You mate two wild type flies who are both carriers for the dumpy LOF mutation (dp) and the complete LOF how mutation (h-). They both have the same genotype: h- dp / h+ dp+.

dumpy and how are 9 map units apart. If the cross produced 1000 larvae how many, on average, would grow up to have truncated wings? Remember, the complete loss of function mutant dies when coming out of its pupal case, the larval stage is before the pupal stage.

Select one:

a. 2

b. 90

c. 0

d. 4.5

e. 9

In: Biology

Answer all three prompts. 1. Explain the roles of each structure in bacteria cells. 2. Explain...

Answer all three prompts.

1. Explain the roles of each structure in bacteria cells.

2. Explain how bacteria cells make energy for cellular processes.

3. How are plant cells, animal cells, and bacteria cells different?

In: Biology

A new model of transgenic vole was created in which all females are spontaneously maternal. Which...

A new model of transgenic vole was created in which all females are spontaneously maternal. Which experimental manipulation would you expect to cause this result?

A) over expression of oxytocin in the ventral pallidum

B) over expression of D2 receptors in the caudate putamen

C) over expression of vasopressin receptors in the nucleus accumbens

D) over expression of oxytocin receptors in the nucleus accumbens

In: Biology

Question 1 (1 point) Saved Imagine that you are working with DNA sequences of soluble proteins...

Question 1 (1 point)

Saved

Imagine that you are working with DNA sequences of soluble proteins (not membrane proteins) and have the technology to genetically engineer/alter the existing sequence and you can express this particular protein in a yeast cell model.

You also have the power to track and visualize where the genetically engineered proteins traffic in your model system.  

You engineer an ER signal sequence to the amino-terminal end of a normally cytosolic protein.   

Which best describes the fate of this protein?

Question 1 options:

A. The protein is translocated through the ER membrane translocon channel, N’ end first

B. The protein is translocated through the ER membrane translocon channel, C’ end first

C. The protein remains in the cytosol

Question 2 (1 point)

You engineer an ER signal sequence to the carboxyl-terminal end of a normally cytosolic protein.   

Which best describes the fate of this protein?

Question 2 options:

A. The protein is translocated through the ER membrane transloconchannel, N’ end first

B. The protein is translocated through the ER membrane transloconchannel, C’ end first

C. The protein remains in the cytosol

In: Biology

Your supervisor wants you to dilute a 1 mL stock BSA solution (1 mg/mL) into 1:10...

Your supervisor wants you to dilute a 1 mL stock BSA solution (1 mg/mL) into 1:10 dilutions. What is the final concentration of diluted BSA solution? Show your work. How much volume (mL) of BSA and distilled water would you need to perform the dilution? Show your work.

In: Biology

Question 20 (Mandatory) (1 point) Select all of the following which could cause an anemia that...

Question 20 (Mandatory) (1 point)

Select all of the following which could cause an anemia that is classified as normocytic/ normochromic.

Question 20 options:

hemoglobin E disease

hemoglobin SC disease

beta-thalassemia minor

aplastic anemia

decreased red blood cell production

Hereditary spherocytosis

liver disease

renal disease

Question 21 (Mandatory) (1 point)

Which of the following is NOT associated with a spectrin abnormality?

Question 21 options:

Hereditary stomatocytosis

Hereditary pyropoikilocytosis

Hereditary spherocytosis

Hereditary elliptocytosis

Question 22 (Mandatory) (1 point)

Stomatocytes can be seen in increased numbers on the slide due to poor slide making technique.

Question 22 options:

True
False

Question 23 (Mandatory) (1 point)

Abetalipoproteinemia will show which of the following on the peripheral blood smear?

Question 23 options:

spherocytes

stomatocytes

target cells

acanthocytes

Question 24 (Mandatory) (1 point)

A decrease in all cell lines is referred to as ______________________.

Question 24 options:

pancytopenia

panmyelosis

hyperplasia

Question 25 (Mandatory) (1 point)

Rh null disease is associated with the presence of ____________________.

Question 25 options:

spherocytes

stomatocytes

schistocytes

acanthocytes

In: Biology

1.Imagine a locus with two alleles, A and a, in a wild population of touch-me-not (Impatiens...

1.Imagine a locus with two alleles, A and a, in a wild population of touch-me-not (Impatiens capensis) plants,which has both out crossing and selfing flowers.40 AA, 2 Aa, and 18 aa genotypes are found among 60 individuals.

a.Calculate the allele frequencies p= freq(A) and q=freq(a)

.b.How many individuals of each genotype would be expected if the HW assumption were met?

c.Is this population in HWE? Explain your answer.

d.Uh oh,bad year for pollinators!What would be the genotype frequencies in the next generation if the plant only produced selfed progeny? (Hint: the coefficient of inbreeding for selfing in a diploid is 0.5.This is because the chance of the two alleles in the selfed offspring being identical-by-descent one generation back is 1/2).

e.Oh no, it looks like the pollinators are gone forever!What would be the frequency of heterozygotes at equilibrium (i.e. after many,many generations of selfing)

In: Biology