Question 1

Which is the likely order of evolution of snake venom?
 I. diversification of venom genes
II. duplication of defensin gene
III. single copy of defensin gene
IV. gene recruitment in venom gland

Accepted Answer

A)  III - II - IV - I 
B)  III - II - I - IV 
C)  IV - II - III - I 
D)  IV - I - III - II

Question 2

A bacterial spore

Accepted Answer

A)  is an adaptation coded by a single gene. 
B)  is an adaptation coded by epistatic genes. 
C)  is a complex adaptation coded by a single gene. 
D)  is a complex adaption coded by a regulatory network of genes.

Question 3

Bilateral symmetry in plants

Accepted Answer

A)  is a complex adaptation that evolved from developmental regulatory genes. 
B)  may have evolved 70 separate times. 
C)  was a key innovation for flowering plants by increasing pollination efficiency. 
D)  a and b 
E)  a, b, and c

Question 4

The populations of the ray-finned teleost fish, Astyanax, that repeatedly colonized underground Mexican caves and evolved the same suite of derived traits in cave after cave is an example of

Accepted Answer

A)  deep homology. 
B)  parallel evolution. 
C)  convergent evolution. 
D)  genetic drift.

Question 5

A paralog is a(n) ________, while an ortholog is a(n) ________.

Accepted Answer

A)  homologous gene within a species; analogous gene separated by a speciation event 
B)  homologous gene separated by a speciation event; homologous gene that arises from a duplication event 
C)  homologous gene within a species; homologous gene separated by a speciation event 
D)  analogous gene within a species; homologous gene within a species

Question 6

What is parallel evolution? Please give an example.

Accepted Answer

The answer of What is parallel evolution? Please give an...

Question 7

Which of the following statements is accurate regarding opsin evolution?

Accepted Answer

A)  The common ancestor of jellyfish and humans had only one type of opsin. 
B)  In deuterostomes, r-opsins evolved into the primary photoreceptors. 
C)  The earliest bilaterians had three types of opsins. 
D)  none of the above

Exam 9: From Genes to Traits: the Evolution of Genetic Networks and Development

Which is the likely order of evolution of snake venom? I. diversification of venom genes II. duplication of defensin gene III. single copy of defensin gene IV. gene recruitment in venom gland

A bacterial spore

Bilateral symmetry in plants

The populations of the ray-finned teleost fish, Astyanax, that repeatedly colonized underground Mexican caves and evolved the same suite of derived traits in cave after cave is an example of

A paralog is a(n) , while an ortholog is a(n) .

What is parallel evolution? Please give an example.

Which of the following statements is accurate regarding opsin evolution?