Hemostasis is the ability to maintain the optimal internal environment for human biological functions
a. true
b. false
Ans: b. false
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There are nine coat colors known in foxes. If a red
fox were crossed with a double-black fox, all the hybrids would be red above and black below in a pattern known as blended cross. If two blended crosses were mated, the F2 ratio would be as follows: 1 red, 2 smoky red, 2 cross red, 4 blended cross, 1 standard silver, 2 substandard silver, 1 Alaskan silver, 2 sub-Alaskan silver, and 1 double black. (a) Using the letters A/a and B/b to serve as the genes for these animals, develop a genotype for each variety listed. (b) Two crosses will produce all blended-cross offspring. One is used above (red fox x double black); what is the other? (c) List the genotype and phenotype of all the pure-breeding foxes. (d) Give the genotypic and phenotypic ratio of a cross between two substandard silvers. (e) Give the genotype and phenotype of the offspring produced in a cross of a sub-Alaskan silver and a cross red. What will be an ideal response?
Control systems most likely involved in maintaining homeostasis are termed positive feedback
Indicate whether the statement is true or false
Which of the following statements regarding the flow of genetic information is false?
A) Polypeptides form proteins that determine the appearance and function of the cell and organism. B) Eukaryotic mRNA is processed in several ways before export out of the nucleus. C) Transcription occurs in the cytoplasm of eukaryotic cells. D) Ribosomes function as factories that coordinate the functioning of mRNA and tRNA.
Using this figure, identify which gene has paralogs
a. lab b. Dfd c. Antp d. Abd-B e. All of the above