Meiosis

Front

What is the name of the Belgium scientist who first discovered meiosis in 1883?

Back

Edouard van Beneden

Front

In humans, the haploid number of chromosomes is ____.

Back

23

Front

MEIOSIS

Back

a two-step process that reduces the number of chromosomes in half such that there is only one copy of all the chromosomes

Front

True or False? Before cells undergo meiosis they pass through interphase first.

Back

true

Front

What is unique to Prophase I- is that the duplicated chromosomes pair up to form _______.

Back

a tetrad

Front

In which stage of MEIOSIS does crossing over occur? (The exchange of genetic material between chromosomes in a tetrad.)

Back

Prophase I

Front

In Metaphase I, tetrads line up along the _______. Options: mitotic spindle, centrosomes, equatorial plane, contractile ring

Back

equatorial plane

Front

In Anaphase I, the _________ are separated by the pulling of the spindle fibers to opposite poles of the cell.

Back

homologous pairs of chromosomes

Front

At the start of Meiosis II, which of the following is NOT true?

• There are two cells.
• The cells are haploid.
• The chromosomes are paired up as homologues.
• DNA is present as two sister chromatids joined at the centromere.

Back

The chromosomes are paired up as homologues.

Front

In Prophase II, the _________ reforms and the spindle fibers attach to each chromosome. Options: mitotic spindle, centrosomes, nucleus, cell plate.

Back

mitotic spindle