Humans also have a polarizing region on the posterior side of their limb bud, and that side of the limb bud develops into the "pinky side" of the hand. What does that say about the evolution of morphogens?

Question

Biology

Jeffrey Mckee

23 September, 00:23

Humans also have a polarizing region on the posterior side of their limb bud, and that side of the limb bud develops into the "pinky side" of the hand. What does that say about the evolution of morphogens?

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Answers (1)

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Elisha Hicks · Answer 1

That exist a gradient of concentration among the hand.

Explanation:

morphogens are substances that are localized in different but gradually distribution in some cells of tissues, and this can explain why in the hand there is a change in one or another side, "the pink one and the other" that is the reason why it is not clear a line of difference among the posterior and the anterior side of the hand.

Since in the DNA there are some "spaces" among the expression of some specific genes, of course in the phenotype the expression of these genes are gradually express like the difference of color in the skin.

Hope this info is useful.