Question

Additional copies of a gene ___ cause cellular problems.

Answer 1

sometimes

Step-by-step explanation:

sometimes it causes cellular problems and sometimes it does not.

Answer 2

Additional copies of a gene ON A CHROMOSOME causes cellular problems. The number of chromosomes is fixed for a particular organism. For example, humans have 46 chromosomes or 23 pairs of chromosomes. Each chromosome has segment of the DNA known as genes and is the characteristic of that chromosome. Any alteration such as addition or removal of genes causes cellular problems that lead to changes in phenotypic expressions.