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An experiment was done to determine the linkage relationship of three genes (a, b, and c) in Drosophila melanogaster.
Genes a, b, and c are known to be in that linear order in an organism.
Complete text Investigation 23.1 How can the frequency of alleles be calculated?
Homologous structures do not have to perform the same function in different species. Use a bat limb and a mouse limb to justify this statement.
Do all green house gases deplete the ozone layer? Is there a direct relationship between depleted ozone and increases in heat?
A farmer decides to plant 90% of one field with BT 123 seeds and the remaining 10% of the field with a different seed variety.
In cells that lack adenylyl cyclase? In cells that lack adenylyl cyclase?
Why would you do an experiment on pill bugs and temperature? would they prefer cold or hot temperatures and why? What would happen if I placed them in a two choice chamber?
If you want to protect the plants from insect damage, should you encourage birds to forage on the plants, or put netting over the plants to keep birds out? Explain your reasoning.
Some prey form groups (aggregate) in the presence of a predator.
Sammy Shmoo is whisker-less and is married to Sarah Shmoo who has whiskers. They have 100 children, 52 of them are whisker-less. What are the genotypes of the parents? Show the squares which prove you
A homozygous marries a woman heterozygous blood type
DNA fingerprinting identifies individual bears and also allows for determining the gender of the a bear. What information does it not provide that might be useful for deciding on conservation efforts?
C57BL/6 mice have low pathology of worm infection whereas CBA mice - high pathology. The pathology is associated with granuloma size in liver. The phenotype is dominantly inherited for B6 in that F1 m
Scientists have been able to address specific questions about cell signaling by using innovative experimental approaches.
2. Signaling molecules can regulate transcription and as a result control cell differentiation during development. One signaling molecule, sonic hedgehog (shh), has been shown to regulate the dorsoven
In a continuous culture of a bacterium running at D=0.345 hr-1 glucose is the limiting substrate with a residual concentration of 0.01 g/l. The yield coefficient based on glucose is 0.5 g cell/g gluco
Q1. If water is one of our most abundant resources, why are we concerned about its availability and sustainability for the future? Explain.
It is known that vesicular traffic is crucial for the functions at all levels in an organism.
The sizes of proteins are important for their translocation into the nucleus. Thus, two types of protein translocation can be classified: for small proteins, they are translocated via free diffusion;
One group was vaccinated against a specific disease(X), and other group was not vaccinated against X, the vaccinated group developed the infection .Can you explain ,why sometimes vaccine cause the inf
CD4 helper T cell recognized a processed protein antigens displayed by professional APC ,and are activated to proliferate and differentiate into effector cells.
In your own words, explain what is meant by "post-zygotic mechanisms of reproductive isolation. and name one kind of post-zygotic isolation that is operating.
Cardiovascular diseases are the No.1 killer in the US. The high level of total blood cholesterol significantly increases the risk to these diseases. Scientists have found that cholesterols are not all
Animal cells form centrioles that make spindle fibers to separate chromatids during anaphase of mitosis. If plant cells do not have centrioles, how do they make spindle fibres?