In cocker spaniels, black coat color (B) is dominant
over red (b), and solid color (S) is dominant over
spotted (s). If a red, spotted male is crossed with a
black, solid female and all the offspring from several
crosses expressed only the dominant traits, the
genotype of the female will be
a. BB SS.
b. Bb SS.
c. Bb Ss.
d. BB Ss.
e. none of these.
Answer: a
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Which of the following is evidence for the connection between comets and meteor showers?
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Special cells found in the gonads that give rise to gametes upon division are called
a. germ cells. b. somatic cells. c. stem cells. d. basal cells. e. egg cells.
The nucleus of an atom has a positive charge because of the _______ .
a. electrons b. neutrons c. protons d. valence shell
A major factor in the re-emergence of vaccine-preventable diseases in the early 21st century has been
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