AP BIOLOGY

CELL DIVISION

MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
During this phase, replicated chromosomes become visible but they do not stick together in pairs:
A
Interkinesis
B
Prophase II
C
Prometaphase II
D
Metaphase II
Explanation: 

Detailed explanation-1: -Prophase II: During prophase II, the chromosomes begin to recondense and spindle fibers begin to form once again. These spindle fibers seek out the sister chromatids that are present in the cell. Spindle fibers from one side of the cell attach to one of the sister chromatids.

Detailed explanation-2: -During prophase I, chromosomes condense and become visible inside the nucleus.

Detailed explanation-3: -Crossing over between non-sister homologous pairs occurs in prophase I but not in prophase II (crossing over allows for exchange of genetic information in order to produce genetically unique cells).

Detailed explanation-4: -In prophase I, the first stage is known as leptotene. This stage involves the unwinding of the DNA structure to enable an exchange of alleles between homologous chromosome pairs. No crossing over occurs in prophase II. Therefore, prophase II does not feature leptotene.

There is 1 question to complete.