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A plant species X with n=5 chromosomes was crossed with a related species Y with n = 7 chromosomes. The F1 hybrids produced only a few pollen grains, which were used to fertilize the ovules of related species Z with n=7 chromosomes. A few plants were produced from this cross, and all had 19 chromosomes. The F1 hybrids (with 19 chromosomes) were mated with related species W with n=11 chromosomes. A few plants were produced from the cross and all had 30 chromosomes. Following self-fertilization of the F1 hybrids a few F2 plants were produced, each with 60 chromosomes. These plants were phenotypically different from either of the original species and were highly fertile.
a. Explain by diagram and description the events that produced these fertile F2 hybrids. You must be specific and very clear about what is happeningb. Give the karyotype of the gametes produced by the highly fertile F2 plants.c. Using appropriate genetic terminology, tell what type of plant ultimately arises as a result of the above crosses.
Determine which of the following molecules would double-negative T cells fail to express?
To understand how energy could be flowing in this aquatic ecosystem, list the different autotrophic and heterotrophic organisms found at each pond, and explain its role in energy flow through the system.
Briefly explain why microtubules have two families of associated motor proteins (kinesins and dyneins), while microfilaments have only one family of associated motor proteins (myosins).
Water is most dense and therefore heavier at 4 degrees Centigrade. At zero degrees Centigrade ice forms and can float on liquid water. Assume ice were most dense at zero degrees Centigrade. Select the best explanation of what would happen in aquatic ..
compute the change in G value for the reactions
Use the protein Dynorphin as an example, Explain the cellular production process for creating and secreting of this protein for use in the body.
About 5 percent of individuals with Down syndrome have a chromosomal translocation in which a third copy of chromosome 21 is attached to chromosome 14. If this translocation occurred in a parent's gonad, how can it lead to Down syndrome in a child.
With the help of sire directed mutagenesis, hemoglobin has been created in which the proximal histidine residues in both alpha and beta subunits have been replaced by glycine.
LDL particles have a higher percent content of cholesterol and cholesterol esters than VLDL particles. Describe the catabolism of the VLDL particles that occurs in the circulation and how this accounts for the increased content of cholesterol in t..
Assume you are studying a microorganism from a hot spring that uses organic carbon as an energy and carbon source.
A can of Mountain Dew soda contains 46 g of sugar. Assume that your body completely digests this sugar, 170 kcal of heat energy is available from the sugar. Around how many grams of water will you have to evaporate as sweat to lose this 170 kcal of e..
Create a program that will read a file containing variable-length groups of data and report the average value of each group.
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