Todd Preuss states that genes ______ related to ____ , and the gene ____ related to _____, are examples of genes positively selected in human evolution. 单项选择题

A

FOXP2 and HLA, Memory, MAOB, vision

B

MCH1 and ASPM, brain size; FOXP2, language

C

MAOB and HPZ, cell growth; ASPM, language

D

HLA and IL6R, language; FOXP2, brain size

E

None of the above

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The loss of pelvic spines in freshwater populations of stickleback is due to?

Spots of pigmentation are a characteristic that varies considerably in different species of Drosophila.  In the Figure provided below there is a phylogenetic tree that includes information on species that have spots (indicated by the black circle) and those that lack the spot (indicated by the open circle).  The percentages at the nodes representing hypothetical common ancestors in these lineages is the probability that the indicated ancestor had wing spots.    From the following species, identify those that are appropriate to study the underlying molecular basis for the loss of the wing spot characteristic.     

Spots of pigmentation are a characteristic that varies considerably in different species of Drosophila.  In the Figure provided below there is a phylogenetic tree that includes information on species that have spots (indicated by the black circle) and those that lack the spot (indicated by the open circle).  The percentages at the nodes representing hypothetical common ancestors in these lineages is the probability that the indicated ancestor had wing spots.    From the following species, identify those that are appropriate to study the underlying molecular basis for the gain of the wing spot characteristic.    

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