Red-green color blindness is a sex-linked recessive trait in humans. If a carrier female (heterozygous for the trait) mated with an affected man, what would be the expected outcome(s)?
A. None of the offspring would be color blind.
B. None of the daughters would be color
blind.
C. Half of the daughters would be color blind.
D. All of the sons would be color blind.
E. Half of the daughters would be color blind,
and all of the sons would be color blind.
C
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A change in a nucleotide sequence that results in addition or deletion of a single nucleotide and largely changes the amino acid sequence of the resulting peptide is known as a
A) nonsense mutation. B) silent mutation. C) missense mutation. D) frameshift mutation. E) none of the above
Which type of speciation can occur when a population encompasses a vast territory that includes a variety of habitats?
a. Sympatric b. Stabilizing selection c. Gene flow d. Parapatric speciation e. Allopatric
The opisthokonts include all of the following organisms EXCEPT
A. plants. B. fungi. C. choanoflagellates. D. animals.
You are adrift in the Atlantic Ocean and, being thirsty, drink the surrounding seawater. As a result
A) you quench your thirst. B) your cells become turgid. C) you dehydrate yourself. D) your cells lyse from excessive water intake.