Question

3. Aneuploidy describes

a. a phenomenon that only occurs in plants.

b. a condition in which an extra chromosome is present or one is absent.

c. a disomy in somatic cells.

d. an uncommon condition in humans.

e. a mutation with a beneficial effect.

4. If cultured normal human cells are treated with telomerase, the cells are most likely to

a. undergo more cell divisions than normal.

b. undergo fewer cell divisions than normal.

c. die almost immediately.

d. undergo more active gene expression.

e. enter meiosis.

Answer 1

3) Aneuploidy describes a condition in which an extra chromosome is present or one in absent. If more than one chromosome is altered , then it is called euploidy.

It occurs in plant and animal cells both.

4) If cultured normal human cells are treated with telomerase, the cells are most likely to undergo more cell divisions than normal as telomerase increases the rate of cell division and cancer cells show this function. In normal cells , telomerase is suppressed which makes the cell division normal.