BIO 112 - Mitosis and Meiosis Quiz

What is all the DNA in a cell called?

Genome

How many individual chromosomes are in a cell during G1 (prior to DNA duplication)?

46

During which phase of the Cell Cycle do cells grow in size?

G1 and G2

During crossing over what is the zipper like structure that holds the homologs together tightly?

synaptonemal complex

True or False: Crossing over occurs in both meiosis and mitosis

False

What structure consists of 2 bundles of microtubules at right angles?

Centrioles

True or False: Daughter cells from mitosis are genetically identical to their parent

True

What happens in G1?

cell growth, protein & organelle replication

What happens in S phase?

genetic information is duplicated

What happens in G2 phase?

second growth phase occurs and the cells undergo the G2 checkpoint

What is the G2 Checkpoint?

The cycle cell "checks" the cells and stops until MPF is released to trigger the passage of the cell into the M phase

The (blank) is the only checkpoint in the cell cycle that can totally and entirely stop the cell cycle forever

G1

What cytoskeletal structure makes up the mitotic spindle?

microtubules

A haploid cell (in a typical human) has how many chromosomes?

23

What are identical copies of a chromosome?

sister chromatids

True or False: Asexual reproduction involves the fusion of gametes.

false

When does crossing over occur in Meiosis?

Prophase I

What gives rise to genetic variability? (3)

random fertilization, independent assortment of chromosomes, mutations