You are studying a population of wild turtles on a remote Pacific island. You have been following the allelic frequencies at a single two-allele locus 'S', which controls embryonic survival through simple Mendelian inheritance with dominance. The population has been in Hardy-Weinberg equilibrium at this locus for many generations.

At Hardy-Weinberg equilibrium, the frequency of the recessive allele S^d is 0.88

The genotypic frequencies at Hardy-Weinberg equilibrium are as follows:

f(S^DS^D) = 0.0144

f(S^DS^d) = 0.2112

f(S^dS^d) = 0.7744

An increase in ocean temperature between 2018 and 2019 is thought to have driven the population away from Hardy-Weinberg equilibrium at the S locus.

The numbers of sampled offspring by genotype after the 2019 hatch are as follows:

S^DS^D : 200

S^DS^d : 200

S^dS^d : 40

Calculate the relative fitness (W) values for each genotype (you will need all these values in a subsequent step).

a) The relative fitness value for the S^dS^d genotype is [A] (enter your answer as a decimal in the form '0.x'; do not spell out the number as a word; there are no units to include)

b) The type or form of natural selection that has occurred is [B] (use the specific phrase that describes this form of selection completely!).

Now, calculate all genotypic frequencies in the 2019 offspring (first generation after selection):

c) post-selection f(S^DS^D) = [C] (perform this and the following two calculations (d and e) to four significant figures after the decimal point; enter your answers in the exact form '0.wxyz'; make sure to round off correctly; there are no units)

d) post-selection f(S^DS^d) = [D]

e) post-selection f(S^dS^d) = [E]

f) The frequency of the S^d recessive allele in the 2019 offspring (first generation after selection) is [F] (perform the calculation with four significant figures, then round off to 2 significant figures in the final answer; enter your answer in the exact form '0.xy')

How many ATP equivalents are produced from the oxidation of 3 acetyl-CoAs? Hint: There are 2.5 ATP produced when two electrons are transferred from NADH to oxygen by the electron transport chain, and 1.5 ATP are produced when two electrons are transferred from FADH2 to oxygen by the electron transport chain.

At least 400 words. Our system will use turn it in to check the work, so please make sure to use your own words.

Please do not use handwriting, I always have trouble to read the handwriting.

Compare and contrast typhoid fever and salmonellosis.

In the fern, fertilization takes places when ________.

A. moisture is present

B. spores reach the eggs within the archegonia

C. sperm swim in external water to the antheridia

D. conditions are dry enough

E. an insects can provide pollination

what two groups produce seeds?

A. gymnosperms and angiosperms

B. bryophytes and ferns

C. bryophytes and gymnosperms

D. angiosperms and fern

E. angiosperms and bryophytes

Write a well composed paragraph using complete sentences that explains the structure of the cell membrane and then explains how it acts as a gatekeeper to the cell.

Please explain very short and briefly.

1. Describe how ‘sister chromatids’ are different from ‘homologous chromosomes’.

2. Are diploid cells the only cells that can undergo mitosis? What about haploid or tetraploid cells?

3. Genetic variability is created during meiosis. Identify how this variability is created.

4. What is the most challenging aspect of learning about the processes of mitosis and meiosis?

1. What would be the power of magnification when using a microscope with a 10x ocular lens and a 45x objective lens?

• 10x

• 45x

• 55x

• 450x

• 35x
  2. A Petri dish containing isolated colonies of Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa would be described as being

• a pure culture.

• a mixed culture.

• a contaminated culture.

• an axenic culture.
  3. What type of media would be the best choice for isolating a bacterial colony

• nutrient broth

• motility media

• trypticase soy agar

• trypticase soy broth
  4. Mannitol salt agar contains (among other ingredients) extracts of animal tissue and mixed proteins, along with sodium chloride, which inhibits the growth of organisms other than those in the genus Staphylococcus. It also includes mannitol, which is fermented by Staphylococcus aureus, turning the medium yellow. Other species of Staphylococcus (which do not ferment mannitol) will still grow, but the medium remains red in color. Mannitol salt agar could be classified as
  

  Check All That Apply

• a solid medium.a solid medium.

• a liquid medium.a liquid medium.

• a differential medium.a differential medium.

• a selective medium.a selective medium.

• a complex medium.a complex medium.

• a defined medium.

7. Draw a concept map of integument repair using the following terms:

• Mast cells    
• Collagen fibers
• Macrophage                
• Fibroblasts
• Inflammatory response
• Scab
• Scar tissue
• Phagocytosis

Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two samples isolated from the Deepwater Horizon leak in the Gulf of Mexico were labeled A and B. The DNA of each was isolated and the percent thymine measured in each sample. Sample A contains 18.7 % thymine and sample B contains 27.9 % thymine. Assume the organisms contain normal double‑stranded DNA and predict the composition of the other bases.

1. Discuss what is cell theory and why all living things have cells.

2. Discuss how cohesion and adhesion differ or compare.

3. Discuss how cells derived from pre-existing cells.

4. Discuss why does ice float on water? What would happen if ice was able to sink

Why do you think it is that quick weight loss does not lead to long term weight loss?

1. Define the Kingdom Plantae before and after the impact of Whittaker, Margulis, and Schwartz (1969-1988). How has the change in classification schemes impacted the study of biology? Which of these two views is more consistent with the view of Marine Botany? Why?

Assume that three capital letter alleles (A, B and C) control dark pigmentation because more melanin is produced. The lower-case alleles of these three genes (a, b & c) control light pigmentation because lower amounts of melanin are produced. The effect of these alleles is additive meaning a genotype with all capital alleles (AABBCC) has the maximum amount of melanin and very dark skin. A genotype with all small case alleles (aabbcc) has the lowest amount of melanin and very light skin. Each capital allele produces one unit of color, so that a wide range of intermediate skin colors are produced, depending on the number of capital alleles in the genotype.

What would be the possible skin colors (based upon total units of color) produced and their ratios by the following mating: Male - AaBbCc (3 units) X Female - aabbCc (1 unit).