NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which phase of mitosis is where the chromosomes condense and become visible “X” shapes?
A
Prophase
B
Metaphase
C
Anaphase
D
Telophase
Explanation: 

Detailed explanation-1: -Prophase is the first phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses.

Detailed explanation-2: -Prophase. Prophase is the first phase of mitosis, during which the loosely packed chromatin coils and condenses into visible chromosomes. During prophase, each chromosome becomes visible with its identical partner (sister chromatid) attached, forming the familiar X-shape of sister chromatids.

Detailed explanation-3: -The chromosomes during Prophase under a microscope are seen as X-shaped bodies (the typical structure of chromosomes after condensation). This X-shape is nothing else but the replicated chromosome comprising of two sister chromatids. DNA molecules: Condensed (visibility increases because of this condensation).

Detailed explanation-4: -Chromosomes first become visible during prophase of mitosis. During prophase, the chromosomes condense. They go from a very loosely packed, disorganized stage, to the ‘X’ shaped form we normally see in text books.

Detailed explanation-5: -Chromatin condensation begins during prophase (2) and chromosomes become visible. Chromosomes remain condensed throughout the various stages of mitosis (2-5).

There is 1 question to complete.