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Question: In the fruit fly, the wild type purple eye color is produced by a combination of brown xanthommatin and bright-red drosopterin pigments. The autosomal recessive mutation bw blocks production of dropsopterin, causing a brown eye color. The sex-linked recessive mutation garnet (g) blocks production of xanthommatin pigment, leading to a bright-red (garnet) appearance of the eyes. Flies of genotypes ggbb or gYbb are white eyed.
From pure-breeding garnet and brown stocks, a garnet male is crossed with a brown female.
1) What are the phenotyoes of the male and female F1 progeny?
2) When these F1 flies are inter-bred, what phenotypes are expected in the F2, and in what ratios?
Which phyla lack organs? What kind of the symmetry do they have? State all of the phyla which show cephalization?
A harder one which requires a little more algebra. You have 90.00 mL of dH20. How much glycerine would you have to add in order to make exactly a 1 percent (v/v) dilution?
Please describe how one might search for chemical structure, biologic function relationships, involving small molecular weight lipophylic compounds. Provide one example.
Chlamydias and rekettsias were once classified as viruses because of their small size and obligate intracellular growth requirement. What are some of techniques can be used to illustrate that they are really bacteria.
Trace a route of air from the nares to an alveolus. Name subdivisions of organs where applicable, and discriminate between conducting and respiratory zone structures. how large a force does she exert on the sled.
Distinguish between the terms configuration, margin, and elevation. Describe the best way to view each of these characterisitcs?
Think about a man who has been exercising. His arterial receptors detect a rise in his blood CO2 and send this information to the brain. He requires to increase both the rate and depth of his breathing.
In a study of intraspecific aggression, an experimenter finds that sixteen out of 23 animals tested in species A exhibit aggression,
If the centrioles are mispositioned in the cell, the functional mitotic spindle would fail to form. In this state, how will chromosome segregation be affected . Microtubules will not attach to kinetochores.
An optional technique of performing the catalase test exist where hydrogen peroxide is dropped directly into a colony growing on an agar plate.
All known human cancers have been demonstrated to be caused by viruses, You have been asked to design a virus that causes cancer in humans. Which of the following cellular functions would this virus have to possess to cause a tumor (select all that..
There are several examples of the eukaryotic cells. Algae, Fungi, Plants, and Animals are all composed of eukaryotic cells. Some algae and fungi are unicellular organisms.
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