1. How long is it thought to have taken for the speciation of 18 different finch

Question

1. How long is it thought to have taken for the speciation of 18 different finch species?

2. After, the drought it was found that large ground finches with big beaks AND medium ground
finches with small beaks both had an advantage. What type of selection does this represent?

3. It is known that HMGA2 gene regulates the expression of other genes. What is the name of the
group/classification of genes with this role?
4. This gene is also found in humans and mice, but with different functions. Is this an example of
homology or analogy, and what does that imply finches, humans, and

. The genetics of the HMGA2 gene result in individuals with two copies of one allele having big beak,
individuals with two copies of the alternative allele having small beaks, and individuals with one of
each having what size beak? What type of

inheritance pattern is this an example of?

6. The sentence “Small-beak variants of HMGA2 aren’t new changes brought on by the drought”
explains which common misconception of evolution?

7. Finally researchers have also found that hybridization due to interbreeding between populations
also is contributing to genetic variation. Which Hardy-Weinberg factor does this describe.

Explanation / Answer

1)one million to two million years. 2)During the drought only a limited number of small seeds were produced leaving mostly larger tougher seeds available for food so it was useful for medium sized small bead finches, it was under natural selection. 3)HGMA2 it is high mobility group AT hook 2, its gene type is protein coding, this gene encodes a protein that belongs to the non histone chromosomal high mobility group protein family 4) analogy trait, ( time is over so not able to complete)

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