Question 1

Which of the following statements about the evolution of eyes in mice and fruit flies is false?

Accepted Answer

A) The gene Pax6 codes for a transcription factor involved in lens formation in the mouse. 
B) In the fruit fly,the gene eyeless codes for a transcription factor involved in lens formation. 
C) When the mouse gene Pax6 is inserted into a fruit fly;it forms a vertebrate-type lens on the fly's leg. 
D) The sequences of the genes eyeless and Pax6 are very similar. 
E) In blind cavefish,Pax6 gene expression is greatly reduced. 
A) The gene Pax6 codes for a transcription factor involved in lens formation in the mouse. 
B) In the fruit fly,the gene eyeless codes for a transcription factor involved in lens formation. 
C) When the mouse gene Pax6 is inserted into a fruit fly;it forms a vertebrate-type lens on the fly's leg. 
D) The sequences of the genes eyeless and Pax6 are very similar. 
E) In blind cavefish,Pax6 gene expression is greatly reduced.

Question 2

Eyes in mammals and _____________ are examples of convergent evolution.

Accepted Answer

A) eyespots in butterflies 
B) compound eyes in fruit flies 
C) eyes in great apes 
D) eyes in fish 
A) eyespots in butterflies 
B) compound eyes in fruit flies 
C) eyes in great apes 
D) eyes in fish

Question 3

The evolution of initiation of limb development in tetrapods is best explained by

Accepted Answer

A) a new gene mutation. 
B) the co-option of an existing gene for a new function. 
C) homoplastic convergence. 
D) gene duplication and divergence. 
E) conserved genes. 
A) a new gene mutation. 
B) the co-option of an existing gene for a new function. 
C) homoplastic convergence. 
D) gene duplication and divergence. 
E) conserved genes.

Question 4

The evolution of insect wing patterns is best explained by

Accepted Answer

A) a new gene mutation. 
B) the co-option of an existing gene for a new function. 
C) homoplastic convergence. 
D) gene duplication and divergence. 
E) conserved genes. 
A) a new gene mutation. 
B) the co-option of an existing gene for a new function. 
C) homoplastic convergence. 
D) gene duplication and divergence. 
E) conserved genes.

Question 5

The Pax6 gene,responsible for initiating lens formation in mice,can be inserted into fruit flies and

Accepted Answer

A) causes cancer of the brain as it tries to initiate a mammalian eye. 
B) forms a partial eye since it is somewhat similar to the Pax7 gene of fruit flies. 
C) will have no effect,indicating the extreme differences in lens formation. 
D) can be expressed to initiate formation of a fruit fly eye,but in the wrong place. 
E) it is lethal to them. 
A) causes cancer of the brain as it tries to initiate a mammalian eye. 
B) forms a partial eye since it is somewhat similar to the Pax7 gene of fruit flies. 
C) will have no effect,indicating the extreme differences in lens formation. 
D) can be expressed to initiate formation of a fruit fly eye,but in the wrong place. 
E) it is lethal to them.

Question 6

Which of the following statements about the evolution of eyes is false?

Accepted Answer

A) The eyes of a fly,a squid,a human,and a planarian are homoplastic. 
B) The eyes of a fly,a squid,a human,and a planarian evolved through convergence. 
C) The eyes of vertebrates are homologous. 
D) Different animal groups use different genes to code for eye development. 
E) The common ancestor of most animal groups probably had the ability to detect light. 
A) The eyes of a fly,a squid,a human,and a planarian are homoplastic. 
B) The eyes of a fly,a squid,a human,and a planarian evolved through convergence. 
C) The eyes of vertebrates are homologous. 
D) Different animal groups use different genes to code for eye development. 
E) The common ancestor of most animal groups probably had the ability to detect light.

Exam 25: Evolution of Development

Which of the following statements about the evolution of eyes in mice and fruit flies is false?

Eyes in mammals and _____________ are examples of convergent evolution.

The evolution of initiation of limb development in tetrapods is best explained by

The evolution of insect wing patterns is best explained by

The Pax6 gene,responsible for initiating lens formation in mice,can be inserted into fruit flies and

Which of the following statements about the evolution of eyes is false?

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