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Which statement BEST differentiates amitosis from other forms of nuclear division like mitosis and meiosis?
Amitosis involves DNA replication, while mitosis and meiosis do not.
Amitosis produces genetically identical daughter cells, while mitosis and meiosis produce genetically diverse cells.
Amitosis occurs in somatic cells, while mitosis and meiosis occur in germ cells.
Amitosis lacks chromosome condensation and spindle formation, unlike mitosis and meiosis.
A researcher is studying mitosis in a novel diploid organism with 2n = 16 chromosomes. During metaphase, a drug is applied that inhibits the separation of sister chromatids but allows the cell to progress through anaphase and telophase. At the end of this aberrant cell division, what is the most likely chromosomal composition of the resulting daughter cells?
Two diploid cells (2n=16) each
One diploid cell (2n=16) and one cell with no chromosomes
One tetraploid cell (4n=32)
Two cells with 8 chromosomes each
In an experiment, cells are arrested in metaphase using colchicine, a drug that inhibits microtubule polymerization. If these cells are then fused with cells in G1 phase, what is the most likely outcome for the G1 chromosomes?
The G1 chromosomes will replicate their DNA.
The G1 chromosomes will condense prematurely.
The G1 chromosomes will remain unaffected.
The G1 chromosomes will fragment.
A cell in G1 phase has 2C DNA content. If this cell undergoes endoreduplication twice followed by standard mitosis, what will be the DNA content of the resulting daughter cells?
2C
4C
8C
16C
During meiosis, a hexaploid organism (6n) undergoes a rare mutation where one pair of homologous chromosomes fails to separate during Anaphase I. What will be the ploidy of the resulting gametes?
All gametes will be 3n
Two gametes will be 4n and two will be 2n
Two gametes will be (3n+1) and two will be (3n-1)
One gamete will be 6n, and three will be 0n
A fruit fly cell has 8 chromosomes (2n). If the number of chromosomes at phase is 8, what would be the number of chromosomes after phase?
4
8
16
32
A diploid onion cell (2n=16) undergoes mitosis. What is the number of chromosomes in each daughter cell after the phase of interphase?
8
4
16
32
If a cell has 12 chromosomes at the beginning of interphase, how many chromatids will it have at the end of the phase?
6
12
24
48
During which phase of meiosis does the centromere split, allowing sister chromatids to separate?
Metaphase I
Anaphase I
Telophase I
Anaphase II
In which stage of meiosis do the sister chromatids become independent chromosomes due to the splitting of the centromere?
Prophase II
Anaphase II
Metaphase II
Telophase II
