Multiple choice

Which of the following statements is TRUE?

  1. The worldwide distribution patterns for the ABO blood system signifies the typological model of human variation.

  2. Human blood can be unambiguously typed, i.e. there is no degree of difference.

  3. Mapping the distribution of blood types has proven to be insignificant tool for studying the nature of human variation.

  4. Human blood cannot be unambiguously typed.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Unlike such traits as skin colour and hair texture, blood comes in specific, non-blending types. There are no shades of difference--you cannot be halfway between type O and A.

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