Question

which stage of mitosis is shown? image of a cell options: prophase, metaphase, anaphase, telophase. question 16 1 pts the reduction division of meiosis has occurred when options: the second cell division of meiosis is complete., half of the bivalents line up on each side of the metaphase plate., the first cell division of meiosis is complete., bivalents are cut in half by proteins in their centromeres.

Explanation:

First Question (Mitosis Stage)

To determine the mitosis stage, we analyze the image and stage characteristics:

• Prophase: Chromatin condenses into visible chromosomes, nuclear envelope breaks down, and spindle fibers form. The image shows condensed chromosomes (typical of prophase).
• Metaphase: Chromosomes align at the metaphase plate (not seen here).
• Anaphase: Sister chromatids separate (not seen here).
• Telophase: Chromosomes decondense, nuclear envelope reforms (not seen here).

So the stage is Prophase.

Reduction division in meiosis (halving chromosome number) occurs in Meiosis I.

• Option 1: Meiosis II is equational (no reduction), so incorrect.
• Option 2: Bivalents lining up (metaphase I) is before reduction, incorrect.
• Option 3: After Meiosis I (first division) completes, the cell has half the original chromosome number (reduction occurs here), correct.
• Option 4: Centromere splitting is in anaphase II (equational), incorrect.

Answer:

A. Prophase

Second Question (Meiosis Reduction Division)