Question

1. copies of dna are made during

a. prophase.
c. telophase.
b. anaphase.
d. interphase.

1. which of the following occurs during anaphase?

a. spindle fibres form
b. nuclear membrane disappears
c. chromosomes are pulled to the opposite ends of the cell
d. nuclear membrane reappears around the two new sets of chromosomes

1. the cytoplasm is divided to produce two new cells during

a. prophase.
c. interphase.
b. anaphase.
d. cytokinesis.

1. complete the following spider map for the phases of mitosis. describe what happens during each phase of mitosis.

Explanation:

• Question 21: DNA replication occurs during interphase. Prophase is the start of chromosome condensation and spindle formation. Anaphase is when sister chromatids separate. Telophase is the end - stage of mitosis with nuclear envelope re - formation.
• Question 22: During anaphase, sister chromatids are pulled to opposite ends of the cell by spindle fibers. Spindle fibers form in prophase. Nuclear membrane disappears in prophase. Nuclear membrane reappears in telophase.
• Question 23: Cytokinesis is the process where the cytoplasm divides to form two new cells. Prophase is about chromosome and spindle changes. Anaphase is for chromatid separation. Interphase is for cell growth and DNA replication.
• Question 24:
• Prophase: Chromosomes condense, nuclear membrane breaks down, spindle fibers form.
• Metaphase: Chromosomes line up at the cell's equator.
• Anaphase: Sister chromatids separate and move to opposite poles.
• Telophase: Nuclear membranes reform around the two sets of chromosomes, chromosomes de - condense.

Answer:

• 21. D. interphase
• 22. C. chromosomes are pulled to the opposite ends of the cell
• 23. D. cytokinesis
• 24.
• Prophase: Chromosome condensation, nuclear membrane breakdown, spindle fiber formation
• Metaphase: Chromosome alignment at cell equator
• Anaphase: Sister chromatid separation to opposite poles
• Telophase: Nuclear membrane re - formation, chromosome de - condensation