RNA may fold back onto itself to form regions of double-stranded RNA. (a) Describe at least two structures found in double-stranded regions of RNA. (b) What features of RNA contribute to the stability of these double-stranded RNA regions?

essay answer are limited to about 600 words

In chickens, the presence of feathers on the legs is due to a dominant allele (F), and the absence of leg feathers is due to a recessive allele (f). The comb on the top of the head can be either pea-shaped, a phenotype that is controlled by a dominant allele (P), or a single comb controlled by a recessive allele (p). The two genes assort independently.

Assume that a pure-breeding rooster that has feathered legs and a single comb is crossed with a pure-breeding hen that has no leg feathers and a pea-shaped comb. The F1 are crossed to produce the F2. Among the resulting F2, however, only birds with a single comb and feathered legs are allowed to mate. These chickens mate at random to produce F3 progeny.

What is the expected phenotype ratio for the resulting F3 progeny? Express your answer as two numbers separated by colon.

feathered legs and single comb : no leg feathers and single comb =

Read the paper below and answer the accompanying questions.

‘Whole-genome sequencing expands diagnostic utility and improves clinical management in paediatric medicine’ Stavropoulos et al. npj Genomic Medicine 1, Article number: 15012 (2016) doi:10.1038/npjgenmed.2015.12

How successful was the study at reaching conclusive clinically useful diagnoses?

Briefly describe the relationship between the CNV found and one disease phenotype – why does discovery of the variant provide a diagnosis (what gene is affected, how, what has that got to do with the disease?)

Briefly describe the relationship between the variant(s) found and one disease phenotype – why does discovery of the variant provide a diagnosis?

1-What is true of people with O blood type?

2-Which of the following is true of sphingolipids?

3-Which of the following is true of triacylglycerol AND glycerophospholipids?

Water is both a powerful force and critical to an organism’s survival. Explain how this can be true of water, by providing a detailed example of each situation (including the chemistry aspect as needed).

There is a wide variety of survival strategies used by terrestrial organisms. Explain the difference between ectotherms and endotherms, and an example organism for each.

Many organisms live in environments that experience large changes, giving them seasons. Explain the differences between diapause, hibernation, and torpor. Provide a single organism example for each of the three terms and why that species must use this strategy.

You decide to do to determine the effect of used cigarette butts on water from Morses Creek, NJ and how it affects the water quality index. In the lab, you set up 3 large tanks of water from Morses Creek for the control group and 3 large tanks for the experimental group.

1. What is the independent variable in this experiment?

2. Name four dependent variables that you should measure.

3. What are three controlled variables?

4. Explain how you should set up the control group tanks. Then explain how you would set up the experimental group tanks.

Please answer the following question in your own words.

1. The following relates to Natural Selection and the theory of evolution:

A. How is natural selection related to gene flow, how is it related to genetic drift, and how is it related to mutation.

B. Write a 7 sentence summary discussing how has the theory of evolution contributed to your understanding of humans as a biological species.

According to their calculation of theta, the long term mtDNA Ne= 5000. Now assume that a single African mtDNA lineage migrates from Africa to European Neanderthals. How many years will it take before this single mtDNA lineage would fix in the Neanderthalhals population? Assume 30 years per generation.

Question is: A man produces his alleged girlfriend’s medical documents which include a diagnosis of “vulvovaginitis” with the saline wet mount lab results showing flagellated protozoa. What is the likely diagnosis of the man? Explain your diagnosis.

what is the best the best kind of media (agar or broth medium) to use for identification of the following bacteria:

1. Staphylococcus aureus
2. Escherichia coli
3. Streptococcus pneumoniae

Examples of possible media choices may include: TSA, TSIA, MSA, MacConkey, Blood Agar, EMB, SIM, MR-VP, etc.

Also, provide reasoning behind each selection. Also list if each of the media used are selective and/or differential. What observable changes would you expect to see from the media after a proper incubation period with each bacterial species?

Describe the relationship of yeast and humans?

Reverse Transcriptase (RTase) is an enzyme found in HIV. What is the function of this enzyme in HIV’s life-cycle? What are some uses of RTase for human applications?

How can you tell when you have adequately species diversity? Explain your answer.

What is the unusual about fungal mating strategies -- what unique type of ploidy do they have?

Explain five pieces of evidence that supports the gradualistic mode of an evulotionary trend?