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Life cycle of a fern scenario: Hybrid 1- the sperm in the antheridium has 8 chromosomes; dominant gene 'A' is on one of the chromosomes that produce large sporophyte fronds. Hybrid 2 - egg has 8 chromosomes with recessive gene 'a' that produces small sporophyte fronds. If fertilization took place between both hybrids, how many chromosomes would there be and what would be the genotypes of resulting structures in the fern's life cycle?
A gas takes up a volume of 17 liters, has a pressure of 2.3 atm, and a temperature of 299 K. If I raise the temperature to 350 K and lower the pressure to 1140 mm Hg, what is the new volume of the gas.
You are conducting field work and discover two groups of squirrels living on opposite sides of a lake. How would you plan a study to find out whether these two groups belong to the same species.
Darwin understood how natural selection works in the presence of a population with many variant types. What does that variation consist of? How does the variation arise? How does it spread through the population?
Describe the mechanics of inspiration and expiration.
Determine at least three benefits of the genetically modified bacteria described in the article. Give your opinion on what risks the genetically modified bacteria may pose to those receiving the cancer treatments.
Suppose you analyze three phenotypes in the common fruit fly Drosophila (A,B,D). The recessive alleles causing mutant phenotypes are represented by a,b, and d.
Compare the skull of each of the following vertebrates, Sarcopterygians, Labyrinthodont amphibians, Snake and Therapsida. You should include similarities and differences in the neurocranium.
A 55-year old woman presents with symmetric stiffness and swelling of the proximal interphalangeal joints of the hands and of the metacarpopharyngeal joints, as well as fatigue, malaise, and myalgia. Symptoms are worse in the morning or after exte..
The external faces of some of the proteins in the plasma membrane have carbohydrate groups attached to them.What role do such "sugar-coated" proteins play.
Activation of metabotropic glutamate receptors in neurons is often coupled to the activation of phospolipase C PLC.
Describe how Dendritic cells and T regulatory cells affect immune tolerance. And what woulld happen if there is too much immuno tolerance ?
A woman expressing a dominant phenotype is heterozygous Dd at the locus. Determine the probability that the dominant allele carried by the woman will be inherited by a grandchild?
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