Multiple choice

A human male bearing an allele for a trait on the X chromosome is termed as

  1. heterozygous

  2. homozygous

  3. hemizygous

  4. monozygous
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Human males are termed as hemizygous for any X-chromosome genes, meaning that there are only half (hemi) as many alleles as normally present for a diploid individual. As a result, if males inherit X-linked recessive trait from their mothers, they will show the recessive phenotype.

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