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What distinguishes prophase 1 of meiosis from prophase of mitosis?
In Prophase I of meiosis, a tetrad is formed between 2 homologous chromosomes and their replicates. Small pieces are exchanged between the chromosomes and the tetrad breaks up. Then things happen as usual. So really the only difference is that there's genetic recombination.
Crossing over occurs during which phase of meiosis?
Crossing over occurs during Prophase I of meiosis.
The longest phase of mitosis?
Longest phase is the prophase. It is the first and longest phase
How does prophase you of meiosis differ from prophase of mitosis?
a. chromatids do not separate at the centromere in anaphase I. b. centromeres do not exist in anaphase I. c. crossing-over occurs only in anaphase of miitosis
What would happen if there was zero variation between all of the organisms on earth?
Evolution cannot occur.
What major event happens just before prophase 1 of meiosis but does not occur before prophase 2?
Crossing over of genetic material occurs just before prophase 1 of meiosis, where homologous chromosomes exchange segments. This event does not occur before prophase 2 because homologous chromosomes have already separated during meiosis I.
How does aneuploidy occur?
prophase
What is the difference between prophase mitosis and prophase meiosis?
In prophase I of meiosis, crossing over of homologous chromosomes occurs. This does not happen in prophase of mitosis.
What phase does condensation and shortening of chromosomes occur?
Condensation and shortening of chromosomes occur during the prophase stage of mitosis. In prophase, the chromatin fibers condense and coil tightly to form distinct, visible chromosomes.
In what part of the cell does the replication occur?
DNA replication occurs during Interphase. This is not normally part of the cell division cycle but interphase must occur before subsequent stages such as prophase and metaphase can occur.
Pairing of homologues and crossing over occur during?
prophase I
What phase does meiosis crossing over occur?
prophase 1.
What happens during prophase you that does not happen during mitosis?
During prophase in meiosis, homologous chromosomes pair up and undergo crossing over, exchanging genetic material. This process does not occur during mitosis, where individual chromosomes line up and separate without crossing over.
The events of prophase seem to be opposite of those that occur during what phase?
The events of prophase in mitosis, such as condensation of chromosomes and breakdown of the nuclear envelope, are opposite to those that occur during telophase, where chromosomes decondense, and the nuclear envelope reforms.
What happen of the cell during prophase?
dont know they dush
What represents the phases of mitosis in the order they occur?
prophase, metaphase, anaphase, telophase
What important changes occur to the chromosomes and the nucleus of prophase of mitosis?
something very important
