In a certain breed of chicken, two genes control color. A dominant allele (I) inhibits the expression of any color gene (C). The recessive allele (c) results in albinism when homozygous (cc). The F2 phenotypic ratios of a cross between a colored chicken (ii CC) with a white chicken (II cc) would be ____white, _____ colored.
Fill in the blank(s) with the appropriate word(s).
13, 3
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The aneuploid condition frequently affects the phenotype of an organism
Indicate whether the statement is true or false
A large molecule whose subunits consist of a sugar and a nitrogenous base is called a ____
a. nucleoside b. nucleotide c. nucleic acid d. nucleosome e. nuclear unit
Why are vasodilation and vasoconstriction the main mechanisms to change blood flow?
A. Sympathetic activation has no effect on blood flow. B. Leakage of fluids from the capillaries has no effect on blood flow. C. Blood hematocrit has no effect on blood flow. D. Blood vessel length is relatively fixed and has no effect on blood flow.
Which of the following is the first stage in animal development?
A. Cleavage B. Gamete formation C. Gastrula formation D. Zygote formation E. Blastula formation