Imagine that you have the DNA sequences from the intron of a gene in three species...

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Biology

Imagine that you have the DNA sequences from the intron of agene in three species called A, B, and C. Species A and B are mostclosely related, while C is more distantly related. The sequencesof A and B differ by 18 base pairs, A and C differ by 26 basepairs, and B and C differ by 28 base pairs. Fossils show thatspecies A and B diverged about 1.2 Mya, but there is no fossilevidence as to when the most recent common ancestor of all threespecies lived. Use the genetic data to estimate that date. Whatassumptions are you making to get this estimate?

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Genetic distance is a measure of the genetic divergence between species or between populations within a species whether the distance measures time from common ancestor or degree of differentiation    See Answer
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