The same gene that causes various coat patterns in wild and domesticated cats also causes the cross -eyed condition in these cats, the cross-eyed condition being slightly maladaptive. In a hypothetical environment, the coat pattern that is associated with crossed eyes is highly adaptive, with the result that both the coat pattern and the cross-eyed condition increase in a feline population over time. Which statement is supported by these observations?
A) Evolution is progressive and tends toward a more perfect population.
B) Phenotype is often the result of compromise.
C) Natural selection reduces the frequency of maladaptive genes in populations over the course of time.
D) Polygenic inheritance is generally maladaptive, and should become less common in future generations.
E) In all environments, coat pattern is a more important survival factor than is eye-muscle tone.
Ans: B) Phenotype is often the result of compromise.
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A. initiation B. elongation C. termination D. peptidyl transfer
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What will be an ideal response?
Which of the following targets is NOT regulated by the autonomic nervous system?
A. skeletal muscles B. cardiac muscles C. glands of the body D. smooth muscles E. none of these
Answer the following statements true (T) or false (F)
1. The complement strands of DNA have the same exact nitrogen base sequence, providing the semiconservative replication needed by cells. 2. Any change in a cell's DNA sequence is a mutation. 3. Change in a cell's DNA sequence is a common occurrence in the process of replication. 4. Each newly replicated molecule of DNA contains one conserved strand from the original DNA molecule. 5. A replicated chromosome consists of two sister chromatids.