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Aphids can reproduce sexually and asexually. Females reproduce by themselves and give birth to live females in summer. They also reproduce sexually and lay eggs that survive in summer and eggs that survive in the winter and hatch in the spring. Often found on ornamental plants, aphids are among the most common pest groups for plants. They are also a popular food for many predators including lady bugs, parasitic wasps, and fly larvae.
Explain how the reproductive variability of aphids might be an adaptation that allows them to survive very aggressive predation.
Albinism is an autosomal recessive disease. Dimples are autosomal and dominant to no dimples. A normal woman with no dimples marries a man normal man with dimples.
The time-of-entry mapping method was used to determine the first five markers transferred from each Hfr during a synchronized conjugation experiment. The markers and their transfer order form each Hfr are shown below.
A patient has swollen and painful submandibular lymph nodes. What might this indicate? What might be indicated if axillary nodes were swollen but not painful?
Think about the two linked traits in a population in which half of the individuals are double heterozygotes with genotype AB/ab and the other half are double homozygotes.
What are the effect of discharging primary treated sewage on the biochemical oxygen demand (BOD) and dissolved O2 (DO) of the receiving body of water? What is the effect of a secondary treated sewage on the BOD and DO.
Assume you are provided an isolated muscle with its motor nerve intact. The preparation allows you to make electrophysiological analysis from the nerve and muscle as well as mechanical measurements of muscle contraction.
Suppose you were to construct a synthetic RNA from a repeating dinucleotide AGAGAGAGAG and then use it as a messenger to synthesize a polypeptide in an invito system. What kind of polypeptide would you make from this polynucleotide? Would you expe..
The urine of a thirteen year old boy turned dark brown several weeks after a bout with strep throat. The diagnosis was glomerulonephritis.
Compute the frequencies of the genotypes in future generations if the initial population consists of the following genotype frequencies.
Suppose that the you are given two cultures, one of a speacies of gram-positive bacterium and one of a species of Mycobacterium.
Suppose that the cells grow to about 10^5 cells per squre cm and contain about 10pg RNA per cell, determine the theoretical yield of RNA from one of your samples.
Determine the genotypes of parental, recombinant and if applicable double and triple recombinant progeny from the testcrosses of following individuals.
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