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What happens during metaphase in the cell division?
Metaphase is the phase of cell division where chromosomes line up on the equator of the cell just prior to splitting to the poles at anaphase. During mitosis identical chromosomes pair up on the equator, wheras during meiosis the homologous pairs line up together during meiosis 1 and then homologous chromatids line up together in meiosis 2.
Crossing over occurs during which phase of meiosis?
Crossing over occurs during Prophase I of meiosis.
How is meiosis related to genes?
Meiosis allows a cell to form into 4 cells (by meiosis 1 (which is literally mitosis) and meiosis 2 (mitosis without DNA replication)) in meiosis 1, the cells exchanges DNA information between homologous pairs, this allows genes to be transferred and creates 4 unique and distinct cells. segragation of alleles occur too.
Experiments with cohesion have found that?
cohesions are protected from cleavage at the centromere during meiosis I.
What happens during meiosis that ultimately results in a defect characterized by the deletion of chromosomes?
Nondisjunction occurs in too many cells or too few cells causing defects
When do bivalent align during meiosis?
Bivalents, also known as homologous chromosomes, align during meiosis I. This alignment occurs during the metaphase I stage of meiosis, where homologous chromosomes pair up and line up along the cell's equator.
Does metaphase of mitosis meiosis 1 or meiosis 2 have the haploid number of chromosomes at the equator of the spindle?
Metaphase of meiosis 2 has the haploid number of chromosomes at the equator of the spindle. In meiosis 1, during metaphase, there are still pairs of homologous chromosomes lined up at the equator.
When does bivalent formation occurs?
Bivalent formation occurs during meiosis, specifically during prophase I. This is when homologous chromosomes pair up and exchange genetic material through a process called crossing over. Bivalents are formed as a result of this pairing and crossing over.
Chromatids line up along the equator?
The chromatids line up at the equator of the cell during the metaphase of meiosis. After which the chromatids separate to form individual chromosomes.
How are homologous pairs lined up in both meiosis 2 and mitosis?
Homologous pairs are lined up in both meiosis 2 and mitosis along the equator of the cell during metaphase.
What happens after meiosis to introduce even more genetic variation in sexualy reproducing organisms?
Genetic variation is increased by meiosis Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase
During what phase of meiosis do replicated homologous chromosomes line up next to each other at the cell's equator-?
It is during the anaphase of meiosis that the replicated homologous chromosomes line up next to each other at the cell's equator.
The chromosomes are located at the equator of the cell?
Chromosomes align at the metaphase plate (equator) during metaphase of mitosis or meiosis. This alignment helps ensure equal segregation of chromosomes into the daughter cells during cell division.
What happens to the tetrads in telophase?
During metaphase I of meiosis, tetrads line up along the equator of the cell. They are preparing for separation in the next phase.
If a child is born with down syndrome when did the mutation occur?
During meiosis
Random alignment of chromosomes contribute to genetic variation?
Random alignment of chromosomes occurs during Metaphase I in a cells meiosis. Random alignment is when the homologous pairs of chromosomes line up at the equator or middle of the cell, and are arranged by which member faces what pole. This allows equal opportunity for the chromosomes to migrate to a different cell.
During which phase of meiosis do tetrads line up in the middle of the cell?
Tetrads line up in the middle of the cell during metaphase I of meiosis. This is when homologous chromosomes align along the equator of the cell, creating tetrads with pairs of homologous chromosomes.
