In each of the following comparisons, indicate whether the molecular clock is expected to tick faster on average in the first (1) or the second (2) case. Your answer would be a four-digit number composed of digits 1 and 2 only, e.g. 2222.
( ) 1: The exons, or 2: the introns of a gene
( ) 1: The mitochondrial, or 2: the nuclear DNA of vertebrates
( ) 1: The first, or 2: the third position in synonymous codons
( ) 1: A gene, or 2: its pseudogene counterpart

Question

In each of the following comparisons, indicate whether the molecular clock is expected to tick faster on average in the first (1) or the second (2) case. Your answer would be a four-digit number composed of digits 1 and 2 only, e.g. 2222.
( )	1: The exons, or 2: the introns of a gene
( )	1: The mitochondrial, or 2: the nuclear DNA of vertebrates
( )	1: The first, or 2: the third position in synonymous codons
( )	1: A gene, or 2: its pseudogene counterpart

Quizplus · Accepted Answer

The molecular clock runs faster for sequences that are subject to less purifying selection.

In Each of the Following Comparisons, Indicate Whether the Molecular