Multiple choice

Which one of the following is genetically dominant trait in humans?

  1. Colour blindness

  2. Rh-positive

  3. Albinism

  4. Haemophilia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rh-positive blood type is an autosomal dominant trait; inheritance of one Rh+ allele results in Rh-positive phenotype. The other options are all recessive X-linked traits: color blindness, albinism (oculocutaneous), and hemophilia A/B require two X chromosomes with the recessive allele (or one in males) to be expressed.

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