Genes that control coat color in mammals represent some of the best early examples of genes with multiple alleles exhibiting different phenotypes. A classic example is the C gene in hamsters. Three of the known alleles of this gene are C, c^a and c^k. Each supplies a different amount of black pigment to the coat hair. The phenotypes of three different homozygous strains are as follows.

Based on the concepts of recessivity, determine whether ck and ca were dominant or recessive alleles by crossing the true-breeding albino hamsters  with the true-breeding sepia hamsters. From the resulting F1 progeny phenotype, what would be the ratio of F2 phenotype

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#Question id: 4627

#Unit 11. Evolution and Behavior

Which of the following is not one of Charles Darwin's observations?

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#Question id: 11045

#Unit 7. System Physiology – Animal

The tendency for turbulent flow is greatest in which of the following?

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#Question id: 3731

#Unit 3. Fundamental Processes

RNA primers are synthesized about once every ________.

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#Question id: 1918

#Unit 4. Cell Communication and Cell Signaling

In pancreatic carcinoma the ras gene:

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#Question id: 28880

#Unit 4. Cell Communication and Cell Signaling

Which form of Wnt protein binds to a specific site on the Fz extracellular domain and stabilizes the Wnt-Fz complex?