Why do researchers believe color deficiencies often havegenetic causes? Dietary

Question

Why do researchers believe color deficiencies often havegenetic causes?
      Dietary patterns affect colordeficiencies.
       Color perceptionchanges somewhat as we get older.
       Color deficiencies aremore common in some cultures.
       More males thanfemales suffer from color deficiencies.


A person with red-green color blindness will see the world in______.
       blacks, whites, andgrays
       muted reds andgreens
       blues, yellows, andgrays
       yellows, greens, andgrays


In people who have been blind since birth and who then have hadtheir sight restored, size constancy _____________.
       is absent or severelylimited
       is fullypresent
       takes a while torecover
       is slightlylimited

Explanation / Answer

The first one is because more males than femalessuffer from color deficiencies. This is because the male just haveone X chromosome and if the condition is in the chromosome the manwill suffer this. Woman need the two X chromosome affected by thecondition in order to suffer it.

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