You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. All of the F1 are pink. What can you say about the alleles for the parental traits?
A. Red and white show incomplete dominance.
B. Pink is dominant, whereas red and white are recessive.
C. Both red ad white are recessive.
D. Red is dominant.
A. Red and white show incomplete dominance.
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In humans, hair texture is an incompletely dominant trait. Curly is the dominant genotype, wavy is heterozygous, and straight hair is recessive. What is the probable phenotypic ratio for a cross between a man with wavy hair and a woman with curly hair?
a. All wavy hair b. 3/4 wavy hair; 1/4 straight hair c. 1/2 wavy hair; 1/2 curly hair d. All curly hair e. 1/4 curly hair; 1/2 wavy hair; 1/4 straight hair
Why do vertebrates have more individual Hox genes than most invertebrates, and what is the general significance?
What will be an ideal response?
Cholera symptoms are
A. hypotension, tachycardia, and shock. B. copious watery diarrhea. C. acidosis, sunken eyes, and thirst. D. loss of blood volume. E. All of the choices are correct.
Homologous organs
a. are the results of very different genetic blueprints. b. can have different functions. c. show structural differences in the embryos but are similar in the adult organisms. d. are only found within a species. e. have the same function.