FUNGI

Please answer the following questions on FUNGI (attached). --- LAB 15-A 1- Do the hyphae of zygomycetes contain cross walls (sept)? 2- How would you describe the hyphae of Zygomycetes? LAB 15-B 1- Describe the hyphae of pezira 2- Are ascospores the result of asexual or sexual reproduction? LAB 15-C 1- Describe the hyphae of basidiomycetes 2- Are basidiospores the result of asexual or sexual reproduction 3- In general terms, compare asci and basidia with respect to the roles of meiosis and mitosis in their development LAB 15-D 1- Why are these fungi referred to as imperfect fungi? 2- Penicillium roqueforti (the blue mold that favors Roquefort and blue che... click for more

Evolutionary Preservation of Certain Signaling Pathways

I need some help for coming up with some reasons as to why certain cell signaling pathways are preserved in species over the course of evolution. Why would natural selection favor a certain basic, primitive pathway when more advanced pathways have been developed in higher organisms? For example, a particular wound-healing pathway, the ERK (extracellular signal-regulated kinase) cascade pathway induces repair and regeneration of an asceptically damaged cuticle in fruit flies. ERK works by inducing the activity of the Grainy Head transcription factors to regenerate the cross-linking proteins of the skin. The Grainy Head transcription factors are also present in mice. Why is this so? Is ... click for more

Mendelian Genetics: Cross between corn of two colors: Monohybrid cross of corn. The trait of interest is the kernel color having 2 alleles: R (purple dominant) and r (yellow recessive). Original parents or P1 generation are homozygous purple (RR) and homozygous yellow (rr).

Please answer the attached (5) questions in Post lab -A The trait of interest is the kernel color having 2 alleles: R (purple dominant) and r (yellow recessive). Original parents or P1 generation are homozygous purple (RR) and homozygous yellow (rr). 1) What was the phenotype and genotype of F1 generation? 2) What are the genotypic ratio of F2 generation? 3) What was the expected phenotypic ratio of the F2 generation? 4) Perform the following cross Aa x Aa. Assume that A is dominant to a. What proportion of the offspring would you expect to be homozygous dominant? Homozygous recessive? Heterozygous? 5) A tall plant is crossed with a dwarf plant . The offsprings are all tall. If we ... click for more

Mendelian Genetics

Please answer the attached (6) questions in Post Lab

Develop 2 hypotheses for why only eukaryotic cells are found in multicellular organisms

Often, prokaryotic cells exist as simple unicellular organisms, but in some species, prokaryotic cells can grow together in colonies or filaments. In addition, some species, such as Cynaobacteria or Myxobacteria, demonstrate intercellular communicate , or might even produce specialized cells and structures. However, only eukaryotic cells form the bodies of multicellular organisms with complex internal specialization. Develop one or two hypotheses explaining why only eukaryotic cells are found in multicellular organisms.