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- You and your lab partner performed a complementation test for five recessive histidine auxotrophs. Your plate looks like this: 1 2 3 4 5 1 2 3 4 5 growth no growth What do the gray patches represent ✓ [Select ] What do the tan patches represent? diploid histidine auxotrophs diploid prototrophs haploid histidine auxotrophs haploid prototrophs What is the composition of the medium for this test? [Select] The data contains a conflicting result due to a false positive (that is, it showed growth where it should not have grown) because your partner inoculated a patch too heavily. Which cross most likely led to this result? [Select] How many complementation groups are described by this data, taking into account that a cross yielded a false positive result? [Select]What is the form of inflorescence in these figures?Neurospora of genotype a + c are crossed withNeurospora of genotype + b +. (Here, + is shorthandfor the wild-type allele.) The following tetrads areobtained (note that the genotype of the four sporepairs in an ascus are listed, rather than listing alleight spores):a + c a b c + + c + b c a b + a + ca + c a b c a + c a b c a b + a b c+ b + + + + + b + + + + + + c + + ++ b + + + + a b + a + + + + c + b +137 141 26 25 2 3a. In how many cells has meiosis occurred to yieldthese data?b. Give the best genetic map to explain these results.Indicate all relevant genetic distances, both betweengenes and between each gene and the centromere.c. Diagram a meiosis that could give rise to oneof the three tetrads in the class at the far right inthe list
- Which of the pedigree diagrams below is most likely to show a family with Haemophilia A?A cross was performed between a yeast strain that requires methionine and lysine for growth (met− lys−)and another yeast strain, which is met+ lys+. One hundred asci were dissected, and colonies were grownfrom the four spores in each ascus. Cells from thesecolonies were tested for their ability to grow on petriplates containing either minimal medium (min), min+ lysine (lys), min + methionine (met), or min + lys+ met. The asci could be divided into two groupsbased on this analysis:Group 1: In 89 asci, cells from two of the four spore colonies couldgrow on all four kinds of media, while the other two spore coloniescould grow only on min + lys + met.Group 2: In 11 asci, cells from one of the four spore colonies couldgrow on all four kinds of petri plates. Cells from a second one ofthe four spore colonies could grow only on min + lys plates andon min + lys + met plates. Cells from a third of the four sporecolonies could only grow on min + met plates and on min + lys+ met. Cells from the…Explain why the corn kernel in Figure 18.34d is variegated, with some areas colored and some areas lacking pigment
- At the molecular level (with regard to loss-of-function alleles), explain why the ttvv homozygote has an ovate seed capsule.In the chapter-opening photograph of kernels on an earof corn, what is the genetic basis of the following (Hint:Refer to Figure 15-4 for some clues):a. the fully pigmented kernel?b. the unpigmented kernels? Note that they can arise intwo different ways.The life cycle of the haploid fungus Ascobolus is similar tothat of Neurospora. A mutational treatment producedtwo mutant strains, 1 and 2, both of which when crossedwith wild type gave unordered tetrads, all of the followingtype (fawn is a light brown color; normally, crosses produce all black ascospores):spore pair 1 black spore pair 3 fawnspore pair 2 black spore pair 4 fawna. What does this result show? Explain.The two mutant strains were crossed. Most of the unordered tetrads were of the following type:spore pair 1 fawn spore pair 3 fawnspore pair 2 fawn spore pair 4 fawnb. What does this result suggest? Explain.When large numbers of unordered tetrads were screenedunder the microscope, some rare ones that containedblack spores were found. Four cases are shown here:Case A Case B Case C Case Dspore pair 1 black black black blackspore pair 2 black fawn black abortspore pair 3 fawn fawn abort fawnspore pair 4 fawn fawn abort fawn(Note: Ascospores with extra genetic material…
- please answer, do not copy from google please What is the shape of the ascus? The ascospores inside the asci are produced by meiosis. Are ascospores haploid or diploid? Interspersed among the asci are sterilefilaments, the paraphyses. Deduce the function of paraphyses. The ascospores are released from the asci and undergo mitotic division upon germination. Are the individuals germinating from ascospores haploid or diploid?Diploid nuclei of the ascomycota fungus Neurospora crassa contain 14 chromosomes. A single diploid cell in an ascus will eventually turn into a total of eight ascospores. What is the chromosome count in a single mature Neurospora ascospore? -28 -none of the options are correct -21 -7 -14Where is the illustration?
