How did researchers determine that there had been a leading edge expansion of bl

Question

How did researchers determine that there had been a leading edge expansion of black spruce populations after the last ice age? A)Levels of heterozygosity in the mitochondrial genome were much lower than levels of heterozygosity in the nuclear genome. B)There is a large amount of variability in in black spruce's resistance to cold and this is directly correlated to their geographic distribution. C)There were very low levels of heterozygosity across the entire genome. D)Dendrochronology demonstrates that black spruces found near the southern edge of their distribution are much older than black spruces in the north.

Explanation / Answer

Question: How did researchers determine that there had been a leading edge expansion of black spruce populations after the last ice age?

Answer:

Levels of heterozygosity in the mitochondrial genome were much lower than levels of heterozygosity in the nuclear genome.

Explanation: When they observed the heterozygosity in the nuclear genome, it is comparatively more than the levels of heterozygosity observed in the mitochondrial genome, this evidence clearly indicates the fact that the there was a leading edge expansion of black spruce population after the last ice age.

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.