The evolution of seed plants and later angiosperms appears to be the result of two distinct rounds of whole genome duplication events. These occurred at 319 million years ago and 192 million years ago. Another possible whole genome duplication event at 160 million years ago perhaps created the ancestral line that led to all modern flowering plants. That event was studied by sequencing the genome of an ancient flowering plant, Amborella trichopoda, and directly addresses Darwin's "abominable mystery." COUNT 5
QSN1 How many distinct rounds of genome duplication events are suspected in the evolution of seed plants? ANS1 two QSN2 When did the first whole genome duplication event occur? ANS2 319 million years ago QSN3 What type of event perhaps created the line which led to modern flowering plants? ANS3 whole genome duplication QSN4 How are duplication events studied? ANS4 by sequencing the genome of an ancient flowering plant QSN5 Who coined the term "abominable mystery"? ANS5 Darwin