What does this figure tell us about diversitfication and effective population si

Question

What does this figure tell us about diversitfication and effective population size in the Y chromosome and mtDNA?

A.

Y chromosome diversity and effective population size decreased dramatically during the migration out of Africa (50 thousand years ago), followed by a significant increase in effective population size. mtDNA diversity and effective population size dramatically increased and is significantly larger than that of the Y chromosome.

Y chromosome diversity and effective population size increased dramatically during the migration out of Africa (50 thousand years ago), followed by a severe restriction in effective population size. mtDNA diversity and effective population size dramatically increased and is significantly larger than that of the Y chromosome.

Both diversity and effective population size increased steadily and significantly for the Y chromosome and mtDNA during migration out of Africa (50 thousand years ago), and are now approximately equivalent to each other.

Y chromosome diversity and effective population size decreased during the migration out of Africa (50 thousand years ago) and then recovered to become approximately equivalent to mtDNA.

Y chromosome diversity and effective population size decreased dramatically during the migration out of Africa (50 thousand years ago), followed by a significant increase in effective population size. mtDNA diversity and effective population size dramatically increased and is significantly larger than that of the Y chromosome.

B.

Y chromosome diversity and effective population size increased dramatically during the migration out of Africa (50 thousand years ago), followed by a severe restriction in effective population size. mtDNA diversity and effective population size dramatically increased and is significantly larger than that of the Y chromosome.

C

Both diversity and effective population size increased steadily and significantly for the Y chromosome and mtDNA during migration out of Africa (50 thousand years ago), and are now approximately equivalent to each other.

D

Y chromosome diversity and effective population size decreased during the migration out of Africa (50 thousand years ago) and then recovered to become approximately equivalent to mtDNA.

Y chromosome 150 Thousands of years ago Africa Near-East and Caucasus Andes Southeast and East Asia Central Asia Siberia South Asia Europe Thousands of years ago 100

Explanation / Answer

According to the above picture Y chromosome diversity and effective population size increased dramatically during the migration out of Africa (50 thousand years ago), followed by a severe restriction in effective population size. mtDNA diversity and effective population size dramatically increased and is significantly larger than that of the Y chromosome.

Thus the correct option is (B)

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