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- If a rabbit with the defective gene is fed plants with the pigment, what color is its fat?Is it correct to say that the palladin gene causes cancer?The cyanobacterium Oscillatoria sancta appears reddish-brown when grown under green light but alters its gene expression patterns and becomes blue-green when grown under red light. Explain this observation.
- Predict the phenotypic consequences of each of the following mutations: A. apetala1 defective B. pistillata defective C. apetala1 and pistillata defectiveThe flower color of genetically identical hemp plants (clones) is purple when the flowers develop under cold environment (<14 °C) and white when they develop under hot environment (>30 °C). Describe in detail a molecular mechanism that could explain how these two groups of genetically identical plants differ in their gene expressions to produce different flower colors?The gene controlling ABO blood type and the gene underlying nail-patella syndrome are said to show linkage. What does that mean in terms of their relative locations in the genome? What does it mean in terms of how the two traits are inherited with respect to each other?
- Golden rice is a genetically modified crop plant where the incorporated gene is meant for what?In two sentences answer the following question. If all sheep cells have keratin genes for making wool, why are the keratin genes mostly transcribed in cells involved in making wool?You identify an auxotroph that doesn't grow in normal medium, but does grow in medium supplemented with Q, indicating that it has a defect in one or more enzymes in this pathway. This auxotroph is also able to grow if you supplement the medium with D. Does this data support the one gene-one enzyme hypothesis? a yes, because only one enzyme is disrupted by the mutation b yes, because only one enzyme in the pathway is functional in the mutant strain c no, because multiple enzymes in the pathway could be functional in the mutant strain d no, because multiple enzymes could be disrupted by the mutation
- You have identified five genes in S. cerevisiae that are induced when the yeast are grown in a high-salt (NaCl) medium. To study the potential roles of these genes in acclimation to the growth in high-salt conditions, you wish to examine the phenotypes of loss- and gain-of-function alleles of each. How will you do this?Despite the failure to date of gene therapy, identification of the gene responsible for cystic fibrosis has very recently led to effective treatments for the disease in patients with particular mutant alleles. Give an example?Using a mouse as a model organism to study a multigenic order like type two diabetes is a waste of researchers’ time since mice do not contain the same genes found in humans. Agree/Disagree? Answer and explain here: