Question

station 4: prophase

1. which of the following does not occur during prophase? cross out the untrue statements below.

a. spindle fibers form.
b. genetic material in the nucleus condenses.
c. chromosomes are divided at the centromere into chromatin.
d. chromosomes become visible.
e. dna is replicated.
f. centrioles move towards opposite sides of the cell.

1. what is the role of centrioles?

help arrange the spindle fibers

1. draw label the fibers, an

Explanation:

For question 22:

• Spindle fibers form (a) is a prophase event.
• Genetic material condenses (b) happens in prophase.
• Chromosomes splitting at centromeres (c) is anaphase, not prophase; also, chromosomes condense from chromatin, not split into it.
• Chromosomes become visible (d) is a key prophase trait.
• DNA replication (e) occurs in interphase, not prophase.
• Centrioles move to poles (f) is a prophase event.

For question 23:
Centrioles organize the formation and arrangement of spindle fibers during cell division, which helps align and separate chromosomes.

Answer:

1. The untrue statements to cross out are:

c. Chromosomes are divided at the centromere into chromatin.
e. DNA is replicated.

1. Centrioles help organize and arrange spindle fibers during cell division, which aids in the proper separation of chromosomes.