is random

is directed by centrioles

is directed by mitotic spindle

is directed by nuclear membrane

The S phase is far removed from cell division.

G₁ occurs after the S phase.

The shortest phase in terms of time is usually M.

Many of the enzymes necessary for DNA replication are typically produced during G₁

Interphase

Prophase

Metaphase

G₂ and S phases

G₁ = 40 Pg, G₂ = 80 Pg, Anaphase = 40 Pg.

G₁ = 40 Pg, G₂ = 80 Pg, Anaphase = 80 Pg.

G₁ = 80 Pg, G₂ = 40 Pg, Anaphase = 40 Pg.

G₁ = 80 Pg, G₂ = 40 Pg, Anaphase = 80 Pg.

Separate

Are at the opposite poles

Line up

Cross over

Leptotene through diplotene

Pachytene through diplotene

Zygotene through pachytene

Diplotene through metaphase

M $\rightarrow$ G1  $\rightarrow$   G2 $\rightarrow$  S

G1 $\rightarrow$ G2  $\rightarrow$   S $\rightarrow$  M 

S $\rightarrow$ G1  $\rightarrow$   G2 $\rightarrow$  M 

G1 $\rightarrow$ S  $\rightarrow$   G2 $\rightarrow$  M 

8

16

32

Indetermine

Kinetochore of sister chromatids attach to opposit poles in Meiosis I.

Kinetochore of sister chromatids attach to opposit poles in Meiosis II.

Chiasma is formed in Prophase I.

Homologous chromosomes are segregated in Meiosis I.