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- Why is it important for sister chromatids to be genetically identical? Give a real life situation.Sexual reproduction involves crossing-over to mix up genes. Is this a good thing or a bad thing? In the discussion this week explain one pro and one con to crossing-over. Overall, what is your opinion of crossing-over? Can evolution occur without it? (Min. 50 words)Why is there a need for mitosis and meiosis? Are there characteristics that make them redundant? Explain. If you created an organism, would you use mitosis or meiosis in reproduction? Why? Provide two examples in nature of organisms that only use one process.
- Sexual reproduction is often described as an evolutionary paradox. Why ? What are two hypotheses which suggest that sexual reproduction is not as paradoxical as it may seem? (hint: you will want to describe the costs and benefits of sex, compared to other reproductive modes). Please keep your answer the 1 page provided..What are the two types of reproduction? What is the difference between the two?Explain why the following statement is false: Sexual reproduction is the only mechanism for genetic change.
- Why is meiosis useful? Select all that apply 1. I produces genetically variable offspring 2. it maintains the chromosome number between generations 3. it reduces the frequency of mutations 4. it provides an alternative route to cell division for cells that fail to complete mitosis 5. It does not require proteinsMost eukaryotic organisms use sexual reproduction as their primary means of perpetuating their species. Gametes are formed via meiosis. However, some species primarily reproduce via asexual means. Reproduction is accomplished via mitosis. Aspen trees most commonly reproduce by such asexual methods of cloning.What are the advantages and disadvantages of reproduction by asexual means? Why do some species reproduce in this manner? Why don't all species?A student in your class claims that taking her herbal medicine called YAP clears her coughs. Your friends are skeptical. Design an experiment to test this claim. Make sure you include all the key elements of good experimental design, such as your hypothesis, variables, controls, etc Compare and contrast mitosis and meiosis. Be sure to include in your discussion the products of each, where each process takes place and the purposes of each. You do not need to describe all of the stages of each process.
- Which of the following would not be considered a component of sexual reproduction? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer a Production of eges and sperm in separate sexes in an animal species b. Gradual acquisition of multiple mutations in a purely mitotically dividing eukaryotic single celled organism Occasional production of diploids through fusions of cells of opposite mating types in a yeast that largely reproduces through clonal mitotic divisions "Alteration of generations" between haploid and diploid organisms in a fernSuppose that Dr. Jennings found an organism that has cells with many mitochondria, a cell wall made of chitin, and what appears to be two nuclei in some of the cells but not all. What type of organism might she have found? a fungus that has undergone plasmogamy in some cells an animal that has some cells that are in the process of dividing a plant that is the process of reproducing asexually a bacterial colony a multicellular green algaeWhy do we refer to offspring formed by asexual method of reproductionas clones?