
"A" cells start division and enter in "B" stage of meiotic division and get temporarily "C" at this stage, called "D". Identify A, B, C and D.
A) A: Oogonia; B: Metaphase I; C: Arrested; D: Primary oocyte.
B) A: Oogonia; B: Anaphase I; C: Released; D: Secondary oocyte.
C) A: Oogonia; B: Prophase I; C: Arrested; D: Primary oocyte.
D) A: Oogonia; B: Telophase I; C: Released; D: Secondary oocyte,
Answer
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Hint: Oogonia are the tiniest diploid germ cells that undergo mitosis and give rise to primary oocytes. These cells often have a big nucleus and little cytoplasm.
Complete Step by Step Answer:
The prophase is the first stage of mitosis, which splits the duplicated genetic material contained in a parent cell's nucleus into two identical daughter cells. During prophase, the chromatin, a mix of proteins and DNA found in the nucleus, condenses.
The chromosomes condense, the centrosomes shift, the mitotic spindle forms, and the nucleoli begin to degrade. These are the main processes of prophase.
At the diplotene stage of prophase I, the oogonia cell division is halted.
A single chromosome that fails to correctly adhere to the mitotic spindle might cause cell cycle arrest in the M phase. When cells are exposed to medications that either disrupt or hyperstabilise spindle microtubules, the same cell cycle checkpoint that causes S phase arrest also causes M phase arrest.
The main oocyte is a diploid cell that arises from the oogonia or gamete mother cell. The primary oocyte gives birth to the secondary oocyte following the first meiotic division.
Hence, option C is the correct answer.
Note: Note that the secondary oocyte develops from the primary oocyte during meiosis I and is haploid. After mitosis, the primary oocyte is produced from the oogonia and is diploid.
Complete Step by Step Answer:
The prophase is the first stage of mitosis, which splits the duplicated genetic material contained in a parent cell's nucleus into two identical daughter cells. During prophase, the chromatin, a mix of proteins and DNA found in the nucleus, condenses.
The chromosomes condense, the centrosomes shift, the mitotic spindle forms, and the nucleoli begin to degrade. These are the main processes of prophase.
At the diplotene stage of prophase I, the oogonia cell division is halted.
A single chromosome that fails to correctly adhere to the mitotic spindle might cause cell cycle arrest in the M phase. When cells are exposed to medications that either disrupt or hyperstabilise spindle microtubules, the same cell cycle checkpoint that causes S phase arrest also causes M phase arrest.
The main oocyte is a diploid cell that arises from the oogonia or gamete mother cell. The primary oocyte gives birth to the secondary oocyte following the first meiotic division.
Hence, option C is the correct answer.
Note: Note that the secondary oocyte develops from the primary oocyte during meiosis I and is haploid. After mitosis, the primary oocyte is produced from the oogonia and is diploid.
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