Meiosis (Updated)

Mitosis makes __________ cells like your skin cells and stomach cells.

identical body

Meiosis is a process that contributes to __________ variety.

genetic

Mitosis produces body cells, while meiosis produces __________ and __________ cells.

sperm, egg

Humans have __________ chromosomes in most body cells.

46

Human sperm and egg cells have __________ chromosomes each.

23

Meiosis is called a __________ division because it reduces chromosome number.

reduction

Before meiosis starts, cells undergo a stage known as __________.

interphase

During interphase, cells replicate their __________.

DNA

Meiosis divides the starting cells, which have 46 chromosomes, into cells with __________ chromosomes.

23

The first step in meiosis is __________ I.

prophase

In metaphase I, chromosomes are in the __________ of the cell.

middle

During anaphase I, think of ‘A’ as meaning __________ because the chromosomes are pulled apart.

away

After meiosis I, you end up with __________ new cells.

two

In meiosis II, prophase II is less eventful because there are no __________ pairs.

homologous

In metaphase II, chromosomes line up in a __________ file line.

single

During anaphase II, chromatids are pulled __________ by the spindle fibers.

away

At the end of meiosis II, you form a total of __________ cells.

four

Meiosis in males produces __________ cells.

sperm

The variety of cells produced in meiosis is a result of __________ assortment and crossing over.

independent

Nondisjunction is when chromosomes don’t separate correctly, leading to __________ disorders.

genetic