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Height of spikeweed plants results from polygenic inheritance. Three genes control height, and each dominant "height" allele adds 5cm to the base height of the plant which is 10cm (i.e. a plant with no "height" alleles is 10cm tall). If a plant is homozygous "tall" at each locus the plant will be 40cm tall. A 40cm plant is crossed with a 10cm plant to produce F1 progeny. How tall are the plants in the F1 generation?
How many phenotypic classes (different heights) will there be in the F2 generation (a general answer is sufficient - you do not need to do the 64-square Punnett square)?
A bowl of potato salad was left on picnic table for three hours on hot summer day. The microbial load was 300 CFU/g when the salad was put on table.
In a herd of Shorthorn cattle the frequency of the r allele is .4. Because of prevalence of pinkeye, white cows produce and average of 0.60 calves that reach puberty.
How to use microarray to establish which genes are transcribed in which organs and tissues or different environmental situations?
Perform visual comparison of the assigned two putatively related nucleic acid sequences x and y. Indicate in your answer the identities by 1s on match and 0s on mismatches. Also indicate mutations by the scoring indices S for transition and V for ..
Resistance seems to be an inevitable biological phenomenon. What is resistance and how is it relevant to suppression of malaria (discuss two examples). Is resistance inevitable?
A 20.0 mL sample of gastric juice was taken from a patient suspected of having hypochloridia (low stomach acid). The sample was taken several hours after a meal so there was no ingested food or drink, and it was assumed no buffers were present.
In peas, the allele for tall plants (T) is dominant to the allele for short plants and the allele for purple flowers (P) is dominant to white flowers (p).
A 58-year old woman with diabtetes mellitus presents with a 2 month hisoty of inflammation affecting her left kdieny (chronic pyelonephritis). An accumulation of which of the following inflammatory cells would be expected in a renal biobpy?
Observe under the microscope and choose about 25 cells.Determine the number of cells that are plasmolysed out of the 25 cells.The cells in which the protoplasm appears to have lost contact with the cell wall,even slightly,must be counted.
The coefficient of static friction between his hands and the book is 0.335. To keep the book from falling, what is the magnitude of the minimum pressing force that each hand must exert?
Is this organism recovered more frequently as a nosocomial pathogen, as a community-acquired pathogen, or at similar rates in both settings? Elucidate your choice.
With these anatomical features in mind, do research to find an angiosperm species that has structural modifications to leaves, stems, roots, or flowers that result in adaptive functions. For example, a California Barrel Cactus has spines in place ..
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