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Q1. Seedless watermelons are actually a product of "mistakes in meiosis" These seedless watermelon are triploid (3n) and are produced by crossing a tetraploid (4n) strain with a diploid (2n) plant. Briefly explain why this mating produces a triploid individual. Why can mitosis proceed normally in triploid cells, but meiosis cannot?
Q2. Describe what elements you would test for (and why) to determine whether a microscopic organism collected on a rock from another planet was recently alive or died many years ago.
Sketch another graph showing the response to selection if the heritability, h2, of pesticide resistance is 0.8. Illustrate an experiment that you could use to measure how this population of beetles responds to the selection that occurs when the popul..
What is the probability that they will have a male child who is a hemophiliac. what is the possibility that he will be colour blind.
How various ATP equivalents are required to synthesize de novo one molecule of IMP, starting from ribose-5-phosphate? Presume that all required precursors in the pathway are present.
Why or why not explain with reason? Work the genetics problem predicting the frequencies of the versions of this trait among their prospective children.
In the year following the fires, wildflowers sprouted in all burned areas, closely followed in subsequent years by seedlings of the trees that normally grow in the area, such as aspens and lodge poles pines. What changes in the Ecosystem will take pl..
What techniques might be used to characterize the structure and composition of the structure. Which of the follow will the nurse include in her teaching plan for this patient.
What must a biologist do if she or he finds that different methods of analyzing the same data give different estimates of the relationships among certain taxa.
If the mutation is in mitochrondrial DNA, will the four haploid cells probably be all Pyr-, all Pyr+, or a combination? What if the mutation is in nuclear DNA. Why is mitochondrial function critical for growing on pyruvate.
You get a soil sample and run an enrichment culture on it. You give the organisms in the culture with all of the ingredients required for growth except for nitrogen. What result do you expect to have at the end of the experiment.
We are told that every surface we touch is teeming with bacterial cells, and bacteria are found in the pools we swim in, water we wash with, and on the hands of friends. Why don't we always have problems with bacterial infections all over our bodies.
Describe how each functions, and outline how the organs work together to carry out the role of an organ system. What quantity of the purple flowered, short stem plants in the F2 are expected to be pure breeding. Illustrate the work.
What characteristic of the synthetases explains this discrepancy. Tina is consuming 15 mg of iron per day. Her RDA is 18 mg. She has no condition warranting a greater-than-normal need for iron. Which of the statements is true about her consumption of..
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