Section: Science

111) Which of the following statements about human genetics is true?

A human looks 50% like the father, and 50% like the mother.
Genes are particles found in the nucleus of DNA atom.
Exposure to X-rays can have no effect on a human’s chromosomes.
Half the chromosomes in a human are inherited from the mother, and half from the father.
Fraternal twins are genetically more similar than siblings who are not twins.