answer to: 1) The epicanthic fold is the little bit of skin that dips low over t

Question

answer to:

1) The epicanthic fold is the little bit of skin that dips low over the part of the eye closest to the nose. Many infants have this, regardless of ancestry, but it disappears in ________ as they grow.

a) Africans

b) Europeans

c) western and south Asians

d) all the above

2) In order to learn about the relationships among populations, we would need to examine the variation in DNA caused simply by ________.

a) genetic drift

b) allelic recombination at the Y chromosome

c) mutation

d) gene flow

3) the fertility rate in the united states is reaching ____

a) baby boom

b) baby bust

c) replacement level

d) high birth and death size

Explanation / Answer

Ans-1 the correct option is (D) i.e. all of above

Because epicanthic fold is normally present in North Asian people all the other region don't have it normally.

Ans-2 the correct option is (D) i.e. gene flow

Because gene flow is an important factor of causing genetic variation.

Ans-3 the correct option is (B) i.e. baby bust

Because the significant decrease in the fertility rate is marked by baby bust.

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