AP BIOLOGY

LABORATORY REVIEW

MITOSIS AND MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which phase of meiosis? Chromosomes do not duplicate, nuclear membrane breaks apart
A
Prophase 2
B
Prophase 1
C
telophase 1
D
anaphase 2
Explanation: 

Detailed explanation-1: -During prophase II, chromosomes condense and the nuclear envelope breaks down, if needed. The centrosomes move apart, the spindle forms between them, and the spindle microtubules begin to capture chromosomes.

Detailed explanation-2: -The first stage of Meiosis II is prophase II. Here the chromosomes condense once again, while the nuclear membrane breaks down and a spindle apparatus begins to form in each of the daughter cells.

Detailed explanation-3: -During prophase II, the chromosomes condense, and a new set of spindle fibers forms. The chromosomes begin moving toward the equator of the cell. During metaphase II, the centromeres of the paired chromatids align along the equatorial plate in both cells.

Detailed explanation-4: -Prophase II: It is visibly obvious that replication has not occurred. Metaphase II: The paired chromosomes line up. Anaphase II: The chromatids split at the centromere and migrate along the spindle fibers to opposite poles.

Detailed explanation-5: -Chromosomes do not duplicate. Nuclear membrane and nucleolus breaks apart.

There is 1 question to complete.