The reason that paralogous genes can diverge from each other within the same gene pool, whereas orthologous genes diverge only after gene pools are isolated from each other, is that _____
A) having multiple copies of genes is essential for the occurrence of sympatric speciation in the wild
B) paralogous genes can occur only in diploid species; thus, they are absent from most prokaryotes
C) polyploidy is a necessary precondition for the occurrence of sympatric speciation in the wild
D) having an extra copy of a gene permits modifications to the copy without loss of the original gene product
D
You might also like to view...
At the most fundamental of levels, differences in life histories (that is, reproductive strategies) are trade-offs that are based on differences in the ________
A) onset of reproductive maturity B) reproductive sizes of the individuals C) allocation of energy between individuals D) average number of offspring produced over the life span of individuals
Blood flow through vessel A, 1 mm in diameter, occurs with a 10 kPa pressure gradient from one end to the other. Blood flow through vessel B, 2 mm in diameter, occurs with a 1 kPa pressure gradient from one end to the other. Other conditions are identical. Compared to vessel A, blood flow in vessel B is ____.
a. 1/10 as fast b. 1.6 times faster c. 16 times slower d. 10 times faster
In addition to ATP, what are the end products of glycolysis?
A. CO2 and NADH B. CO2 and pyruvate C. H2O, NADH, and citrate D. CO2 and H2O E. NADH and pyruvate
Both eukaryotes and prokaryotes require a promoter region for gene transcription.
Answer the following statement true (T) or false (F)