I need help on answering all of these questions, all of theme as they relate to

Question

I need help on answering all of these questions, all of theme as they relate to biology/anthpology.

1) A source of human genetic variation is _____________.

A) mutation

B) natural selection

C) genetic drift

D) geography

2) Which of the following increases HLA diversity?

A) Monogamous mating

B) Population bottlenecks

C) Polygyny or polyandry

D) Exogamy

3) Your karyotype is made up of __________.

A) 23 chromatids

B) 46 chromatid pairs

C) 23 chromatid pairs

D) 92 chromatid pairs

4) History, language and genetic research suggest that Scandinavians’ pigmentation is the result of _________.

A) Gene flow

B) Genetic Drit

C) Natural selction

D) Superior genes

5) Immune globulins’ (immunoglobulins') job is to ____________.

A) specifically target the germ's RNA

B) recognize specifically your own proteins and turn them against those of the germs

C) recognize foreign proteins

D) recognize specifically the foreign lymphocytes

6) In what way does sickle cell anemia improve human fitness where there is malaria?

A) Changes red blood cells from the shape of a disk to that of a sickle

B) Diminishes oxygen carrying capacity of the red blood cells

C) Shortens the life span of the red blood cells

D) Causes the malaria parasite to reproduce more quickly

Explanation / Answer

1. A. A source of human genetic variation is mutation.

2.D.Exogamy increases HLA diversity.

3. C.Human Karyotype made up of 23 chromatid pair

4.C. Scandinavian pigmentation is a result of natural selection.

5.C. immunoglobulin job is to recognize foreign proteins.

6.C . Short life span of sickle cell anaemia disable the plasmodium life cycle to be complete.

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