In order to unravel the mysteries of human genetics scientists have studied the genetics of many other organisms. One organism that has taught us a lot is the fruit fly. Fruit flies (Drosophila melanogaster) reproduce sexually. Sex cells from both parents, each containing four chromosomes are combined to create a single-celled zygote with eight chromosomes. That cell undergoes mitotic cell division to create identical copies of itself. These cells differentiate into specialized cells. Knowing that the cells in the eyes have the same DNA as the cells that make up the body of the fruit fly, questions were asked to clarify the role of DNA and chromosomes in coding the instructions for traits passed from parents to offspring. 2. Which of these questions is NOT scientifically testable? O Do eye cells and the cells that make up the body make the same proteins? O Does all DNA in a cell code for protein? O What makes eye cells different from the cells that make up the body? O Should scientists study fruit flies to determine how DNA codes for traits? < Previous

Explain how evidence from modern human genomes supports a recent African origin for Homo sapiens. How have findings from ancient DNA altered the simple out-of-Africa model?   this question is from a past paper i found, can it please be answered in extensive detail and in essay form as i feel it would benefit my personal revision to be able to answser a question of this nature about the topic.

Considering only the work of Griffith, Aver, Hersey & Chase, Beadle & Tatum, and Garrod, which of the following is the most complete supported statement?   Question options:   DNA is the genetic material   genes act through enzumes   DNA directs the activity of enzymes   none of these statements are supported by the work of the listed scientists   a gene is a unit of DNA that directs the synthesis of a polypeptide or functional RNA molecule     DNA is transcribed into RNA Which of the following statements regarding the nature of genes is FALSE?   Question options:   some proteins consist of multiple polypeptide chains   not all enzymes are products of genes   the ultimate products of some genes are functional RNAs rather than any types of polypeptides   all of these statements are TRUE   a gene is a unit of DNA…

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The doctor set up a diagnostic test for George in which he received a low dosage of radioactive iodine compounds. The results of the levels of radioactive iodine in his blood were then compared to the levels of radioactive iodine in the blood of a healthy human. The results are shown in the graph below. 100 George 80 60 40 healthy human 20 3 Time After Admnistration of Radioactive lodine (days) 3. a. Write the hypothesis the doctor was investigating with this test. Answer: b. What was the purpose of giving a healthy human radioactive iodine compounds in this experiment? Answer: C. Do the results shown in the graph support the hypothesis? Explain your answer. Answer: Suggest why the graph for the healthy human rose after approximately two days. Answer: е. Outline one treatment that might enable George to recover. Answer: Percentage of Original Radioactive iodine in Blood (%)

QUESTION 2 The theory of evolution states that: O Over time, all living things gradually evolve to become better adapted to their environments until there is a perfect fit between the organism and its environment O Over time, simple organisms become more complex and advanced through evolution O All life on Earth is descended from a single common ancestor, and differences between organisms can all be attributed to evolutionary change O All evolution is caused by Natural Selection, in which individuals with genes that are better adapted to their environments are more likely to pass on those genes to their descendants, altering the allele frequency in the population over time

In a given population on a distant planet, there are 20 red, 25 orange, and 15 yellow creatures. Use Hardy-Weinberg equations and a chi square analysis to determine whether or not this population is in Hardy-Weinberg equilibrium. Show all work. Be sure to state a null hypothesis and explain your conclusion.

Predictions are statements about the evidence you might expect if a hypothesis was supported.   Question 13 options:   True   False

plants were grown using two differenc fertilizers and the number of flowers that each plant produced was counted. to test for a significant effect of fertilizer on the number of flowers at the 5% level significance, the calculated and the critical values were computed. type both the null and the alternative hypothesis for this test in the box below. use full sentences to describe both H0 and H1. (no mathematical terms in the answer)