Multiple choice

The unit of heredity is

  1. locus

  2. chromosome

  3. allele

  4. gene
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A gene is a unit of heredity in a living organism. It is a name given to some stretches of DNA and RNA that code for a type of protein or for an RNA chain that has a function in the organism. Living things depend on genes, as they specify all proteins and functional RNA chains.

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