Understanding Prophase in Mitosis

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In mitotic anaphase, what happens to the centromere and chromatids?

Centromere remains intact, chromatids separate (correct)

Centromere splits, chromatids remain together

Centromere splits, chromatids move closer

Both centromere and chromatids remain intact

During metaphase, how many spindle fibers join a single chromosome from one pole?

Two

Four

One (correct)

Three

What is the relationship between the length of mitotic anaphase and the other phases of mitosis?

Anaphase is of equal length to metaphase

Anaphase is the longest phase (correct)

Anaphase is the shortest phase

Anaphase duration varies in each mitosis

If Anaphase Promoting Complex (APC) is defective in a human cell, what is expected to occur during mitosis?

Chromosome non-segregation (C) Signup and view all the answers

What happens immediately before the reformation of the nuclear envelope during the M phase of the cell cycle?

Chromosome separation in anaphase (B) Signup and view all the answers

Which phase contains chromosomes with half the number of chromatids compared to metaphase?

Anaphase (A) Signup and view all the answers

Which stage of the cell cycle is characterized by the initiation of DNA replication?

G1 phase (A) Signup and view all the answers

What is the distinctive feature of the Diakinesis stage in meiotic prophase?

Terminalization of chiasmata (A) Signup and view all the answers

During which phase does the centriole undergo duplication?

S-phase (D) Signup and view all the answers

In the context of meiosis, what event is associated with the Pachytene stage?

Crossing over (C) Signup and view all the answers

When does the attachment of spindle fibers to kinetochores become evident during cell division?

Metaphase (A) Signup and view all the answers

At which point do some dividing cells exit the cell cycle and enter the quiescent stage (G0) in the cell cycle?

G1 phase (D) Signup and view all the answers

What is the main characteristic of Prophase in mitosis?

Initiation of condensation of chromosomal material (D) Signup and view all the answers

During Prophase in mitosis, what happens to the Golgi complex, ER, nucleolus, and nuclear envelope?

They disappear completely (D) Signup and view all the answers

What is a key feature of chromosomes during Prophase?

They have single chromatids (A) Signup and view all the answers

Why is the initiation of assembly of the mitotic spindle significant in Prophase?

It is essential for chromosome condensation (C) Signup and view all the answers

What occurs at the start of Metaphase in mitosis?

Chromosomes align at the cell equator (A) Signup and view all the answers

Which structure do spindle fibers attach to during metaphase in mitosis?

Kinetochore of chromosomes (D) Signup and view all the answers

Which statement accurately describes the process of meiosis?

Meiosis ensures the conservation of a specific chromosome number in sexually reproducing organisms. (B) Signup and view all the answers

What happens during anaphase 2 of meiosis?

Sister chromatids do not separate. (A) Signup and view all the answers

Which of the following is an accurate comparison between mitosis and meiosis?

Meiosis forms gametes, whereas mitosis forms somatic cells. (B) Signup and view all the answers

In cell division, which stage is correctly matched with its characteristics?

Telophase - chromosomes move away and Golgi complex not present (C) Signup and view all the answers

How many meiotic divisions are necessary to form 100 pollen grains from microspore mother cells?

50 (A) Signup and view all the answers

If a diploid cell at anaphase-I has 10 pg DNA in its egg cell, what would be the DNA content in the diploid cell?

$20$ pg (D) Signup and view all the answers

What is expected to occur if Anaphase promoting complex (APC) is defective in a human cell?

Chromosomes will not segregate (B) Signup and view all the answers

Which sequence of events correctly represents the stages during mitosis?

Condensation → Nuclear membrane disassembly → Arrangement at equator → Centromere division → Segregation → Telophase (A) Signup and view all the answers

When does DNA replication occur in bacteria?

Prior to fission (D) Signup and view all the answers

Which statement is correct regarding the cell cycle?

A cell in G1 phase has double the amount of DNA than a cell in G2 phase (C) Signup and view all the answers

When are homologous chromosomes separated during meiosis?

Prophase I (D) Signup and view all the answers

Which of the following is NOT an expected consequence of APC malfunction in a human cell?

Enhanced chromosome condensation (C) Signup and view all the answers