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You have two true-breeding tomato plants. One is tall (T) with a bristly stem (B) and white flowers (r). The other is short (t) with a smooth stem (b) and red flowers (R). These plants are crossed, producing a heterozygous F1 generation that is tall with bristly stems and red flowers. You predict that self-fertilization of the F1 generation will result in offspring that inherit their alleles in a manner consistent with simple Mendelian inheritance.
You grow 900 F2 tomato plants and record the following results:412 Tall bristly plants with red flowers115 Tall smooth plants with red flowers130 short bristly plants with red flowers98 tall bristly plants with white flowers40 short smooth plants with red flowers56 tall smooth plants with white flowers37 short bristly plants with white flowers12 short smooth plants with white flowers
a. What is the expected number for each phenotype if your hypothesis is correct?
b. How many degrees of freedom are there?
c. Is the hypothesis supported or rejected? Why?
Determine which of the following statements is accurate regarding the evolution of drug resistance in a virus?
What is the main chemical compound found in sewer gas? Why the presence of Thiobacillus (Acidibacillus) species can cause sewer pipe (cement or iron) corrosion? Please explain from the metabolic perspective.
A somatic cell of a given plant species contains threebillion base pairs of nuclear DNA and 12 functional centromeres when observed at the conclusion of stage G2 of the cell cycle.
How are carbohydrates important in RNA and DNA. What is their function in body organs and nerve cells? Do you know of any other functions?
As we know that mean arterial blood pressure = CO cardiac output x total peripheral resistance (TPR), what might be a normal mechanism to compensate for elevated blood pressure?
For NaCl, which MWCO membrane(s) offered for the net movement of water without the movement of NaCl? For glucose, which MWCO membrane(s) offered for the net movement of glucose without net movement of water?
Why is it that gazelles are more likely to stot in response to coursing predators than to stalking predators (african wild dogs vs cheeahs)? I thought it would make sense that it would be profitable to stot in reponse to a stalking predator.
Suppose that plate tectonics and continental drift is in fact occurring, as explained by the convection current hypothesis, what is likely true with regards to relative ages of Atlantic and Pacific oceans?
The population of two hundred individuals goes through a generation of reproduction in which all HWE assumptions are met except for finite population size.
Explain an experiment that would differentiate between simple diffusion and facilitated diffusion of glucose across the cell membrane of a new strain of bacteria.
Discuss all the steps, in order that the electrons from NADH typical pass through before getting oxidized into water. In which part of the citric acid cycle does substrate level phosphorylation occur?
Humans are parts of food chains and food webs, too. Where on a food web would you typically find humans (near the bottom with the producers, at the top with carnivores, or somewhere in between)?
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