A population of plants comes in two flower colors: blue and white. Crossing two blue-flowered plants produces mostly blue-flowering offspring and some white-flowering offspring
Crossing two white-flowered plants produces only white-flowering offspring. This indicates that the white-flowering plants are
A) homozygous dominant for the flower color allele.
B) homozygous recessive for the flower color allele.
C) mutating.
D) heterozygous for the flower color allele.
E) in equilibrium.
B
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Which of the following statements about essential nutrients are true? Essential nutrients _____
I) are necessary for plant growth and reproduction II) are required for a specific structure or metabolic function III) cannot be synthesized by a plant IV) are produced by symbiotic bacteria A) I and IV B) II, III, and IV C) I, II, and III D) I, II, III, and IV
Your parents are both heterozygous for the recessive disorder phenylketonuria (PKU). What is the probability that you
will have the disorder?
a. 25% b. 50% c. 75%
d. 100% e. 25% if your three siblings are healthy; 75% if your siblings also have the disorder
When a protein denatures, what happens to it?
a. it becomes a functional protein b. it combines with sugars to become a signaling protein c. it changes its shape and to assume another function d. it unwinds and loses its three dimensional shape e. it is transported out of the cell
Which of the following pairs is mismatched?
a. human?hominid b. gibbon?hominoid c. gorilla?hominid d. chimpanzee?anthropoid e. Old World monkey?anthropoid