A hypothetical condition in some domesticated fowl is identified phenotypically by patchy loss of feathers on the animals' backs
Although several factors, genetic and environmental, are found to be involved, only about 3% of any population with any of these factors are found with feather loss. Which of the following is a likely cause? A) continuous variation
B) threshold of liability
C) low mutation frequency
D) high number of alleles in one of the genes
E) high number of environmental effects
B
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A. its triple helix structure and bundling. B. its amino acid sequence. C. its ability to bind to polysaccharide molecules. D. Answers a and b are correct.
Members of Mollicutes are commonly called ________; these bacteria are characterized by the absence of cell walls, their small genomes, and simplified metabolic pathways.
What will be an ideal response?
Which of the following is true regarding primary growth in a plant?
a. Primary growth increases the height of a plant. b. Primary growth results in woody tissue. c. Primary growth arises from apical meristems. d. All the above are true. e. Only a and c are true.
The Y chromosome is in the
A. egg. B. egg or sperm. C. polar body. D. sperm.