Mitosis and Meiosis

Why do cells divide?

• to replace old cells

• to keep cells working efficiently

• to make reproductive cells

• all of these are reasons

During which phase of the cell cycle will the DNA duplicate

• Metaphase

• S-phase

• G-phase

• Cytokinesis

What phase during the cell cycle does the cell just do normal stuff?

• interphase

• s-phase

• g phase

• cytokinesis

During meiosis cells must do what to the number of chromosomes?

• double the number

• decrease the number by 1/2

• increase the number by 1/2

• stay the same

The purpose of meiosis is

• to make gametes

• to make identical cells

• to make proteins

• to grow new limbs

By the end of meiosis, there will be ________ new daughter cells (assume all cells mature into reproductive cells)

• 1

• 2

• 4

• 0

In mitosis, the resulting cells are genetically (DNA) _____

• identical (same)

• unique (different)

• a blend of both parents

• none of the above

The purpose of mitosis is

• to make gametes

• to make identical cells

• to make proteins

• to pass on genetic variation

During mitosis cells must do what to the number of chromosomes

• decrease the number by 1/2

• double the number

• increase the number by 1/2

• stay the same

During crossing-over portions of the chromosomes are

• doubling the amount of DNA

• changing from autosomal to gamete cells

• moving to opposite ends of the cells

• swapping DNA to ensure genetic variation