Can you help me understand this Biology question?
1). You are Gregor Mendel. You have 2 pea plants, one that grew from a green seed, the other that grew from a yellow seed. The parents of both plants were previously highly inbred so that each of your plants is homozygous at all genetic loci. You cross the 2 plants; the seeds that develop from the cross are the F1 generation. You count the seeds and compare the number of green seeds with the number of yellow seeds.
Question 1: What are the genotypes of the 2 parents of your cross? Use standard genetic nomenclature.
Question 2: In the F1 generation, what is the phenotype? What is the genotype?
Question 3: In the F2 generation, what phenotypes do you see? For each phenotype, what is/are the genotype(s)?
Question 4: In the F2, what is the ratio of green seeds to yellow seeds?
Question 5: Which phenotype is dominant?
2). Living organisms on Planet Earth range in size from very small (e.g., bacteria) to very large (e.g., blue whales). There is approximately a 3 million fold difference in size between the two. Yet the cells that comprise the organisms on Earth are all roughly the same size, i.e., 10 – 50 um (a 5 fold difference), regardless of whether the organism is a bacterium, a blue whale, or anything in between.
Explain why this is the case. In other words, why are large organisms composed of trillions of small cells, rather than just one big cell?
In composing your answer, think about these considerations when comparing a small single celled organism to a large multicellular one:
3) Global warming is having a catastrophic impact on the biology of the earth. This is due in large part to the combustion of fossil fuels. Although many of the forecasts based on models predict gloomy outcomes for the planet, there are some glimmers of hope. Indicate at least 5 developments now under way giving optimism about resolving the climate change crisis before it is too late to save the planet.
4) Linnaeus was the first to organize life forms according to phylogeny (evolutionary history). The most useful part of his naming system has become known as the Latin binomial.
5 ) Humans have been genetically modifying plants and animals for the last 13,000 years. The technologies for doing this have been based on transferring pollen to stigmas in plants or combining egg and sperm in animals. Within the last 30 years it has become possible to genetically modify any organism using molecular technology. There has been concern in some quarters that the use of molecular technology is riskier than conventional breeding.
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