Question

1. what can the letter a in the prefix of anaphase help you to remember about the sister chromatids in this stage?
2. which of the following does not occur during anaphase? cross out the untrue statements below.

a. once this phase begins, chromosomes are called sister chromatids.
b. chromosomes move along the spindle fibers to opposite ends of the cell.
c. the cell develops a drawn in area called a cleavage furrow.
d. sister chromatids are duplicated.
e. this phase is complete when the movement of chromosomes is ceased, and chromosomes are completely separated.

Explanation:

For question 28:

The prefix "ana-" comes from Greek meaning "up, apart, back". In anaphase, sister chromatids move apart to opposite ends of the cell, so the "A" helps remember that sister chromatids separate/move away from each other.

For question 29:

• a. In anaphase, sister chromatids separate and are then called individual chromosomes, not sister chromatids. This is untrue.
• b. Chromosomes moving along spindle fibers to opposite poles is a defining event of anaphase. This is true.
• c. The cleavage furrow begins to form in late anaphase/early telophase, so it can occur during anaphase. This is true.
• d. Sister chromatids are duplicated during the S phase of interphase, not anaphase. This is untrue.
• e. Anaphase ends when chromosomes finish moving to opposite ends and are fully separated. This is true.

Answer:

1. The "A" helps remember that sister chromatids move apart/separate to opposite ends of the cell during anaphase.
2. The untrue statements to cross out are:

a. Once this phase begins, chromosomes are called sister chromatids.
d. Sister chromatids are duplicated.