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What type of fibers help separate the chromosomes?
Microtubules, specifically kinetochore microtubules, help to separate chromosomes during cell division by attaching to the kinetochore protein complexes on the chromosomes and exerting forces that pull them apart. These microtubules are part of the cell's cytoskeleton and play a crucial role in ensuring accurate chromosome segregation.
What type of chromosome is produced during mitosis?
All chromosomes are reproduced during mitosis.
What change occurs in the amount of DNA during meiosis?
During meiosis, the amount of DNA is reduced by half in each cell division. This reduction occurs during meiosis I when homologous chromosomes separate, leading to cells with only one set of chromosomes (haploid). This reduction is necessary to ensure that when egg and sperm cells combine during fertilization, the resulting zygote will have the correct amount of DNA.
How are nondisjunction and polyploidy related?
The difference between polyploidy and nondisjunction is that being polyploidy is a result of nondisjuction. When the metaphase II doesn't occur properly the homologous pairs will stay together. Leaving one cell with out that chromosome and with with an extra. Polyploidy has one too many chromosomes.
What is the type of assortment that involves the random distribution of homologous chromosomes during meiosis?
Independent.
Why is it necessary that DNA is packaged into chromosomes?
If DNA remained in a thread-like state it would be very difficult to effectively separate all the individual strands during any type of cell division. Discrete chromosomes created during the pachytene phase are much easier to separate cleanly.
What phase has a spindle that forms in a haploid cell?
The phase that has a spindle forming in a haploid cell is meiosis. Meiosis is a type of cell division that produces reproductive cells with half the number of chromosomes as the original cell. During meiosis, a spindle apparatus helps separate the chromosomes into daughter cells.
What occurs during meiosis?
During meiosis, a type of cell division that produces gametes (sperm and egg cells), there are two consecutive divisions, resulting in four daughter cells with half the number of chromosomes as the parent cell. This process introduces genetic diversity as a result of crossing over and random alignment of chromosomes. Meiosis involves stages like prophase, metaphase, anaphase, and telophase, resulting in cells with unique genetic combinations.
What is the function of the spindle apparatus?
Microtubules
A type of protein found in eukaryotic chromosomes but not prokayotic chromosomes is?
This type of protein is a histone.
Why do chromosomes become more visible during prophase?
During prophase, chromosomes condense and become more visible because they coil tightly to form shorter and thicker structures. This condensation helps prevent tangling and facilitates the movement of chromosomes during cell division. Additionally, the condensation of chromosomes helps ensure that each daughter cell will receive the correct number and type of chromosomes.
What type of sex chromosomes does a male have does?
XY chromosomes SDT
