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Crossing-over occurs between non-sister chromatids, since (prior to crossing-over) sister chromatids are genetically identical (i.e. one is a duplication of the other). Therefore, if sister chromatids underwent a cross-over, no genetic variation would occur.

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What are segments of nonsister chromatids that break and reattach to the other chromatid?

Segments of nonsister chromatids that break and reattach to the other chromatid are known as crossover events. During meiosis, crossover events occur during prophase I and involve the exchange of genetic material between homologous chromosomes, increasing genetic diversity in offspring.


What is the name of the structure that connects the sister chromatids?

The cell structure that joins two sister chromatids into one single chromosome is called the centromere. This is at the center of the sister chromatids.


Which set of chromatids illustrates the result of a single crossover of the homologous chromosomes?

A single crossover of homologous chromosomes results in two chromatids that have recombined genetic material from both parents. This means that two of the chromatids will have segments from one homologous chromosome, while the other two will retain the original segments from the other homolog. Therefore, the set of chromatids illustrating this result will show two chromatids with new combinations of alleles and two chromatids with the parental combinations.


What are the sister chromatids in a chromosome attached by?

Sister chromatids in a chromosome are attached by a structure called the centromere. The centromere is a region where the two sister chromatids are held together until they separate during cell division.


Which molecules is critical for the proper separation of sister chromatids?

The molecule critical for the proper separation of sister chromatids is called cohesin. Cohesin is a protein complex that holds the sister chromatids together during cell division. It helps ensure that the sister chromatids are accurately and evenly separated into two daughter cells.

Related Questions

When does synapsi occur?

when two of homologous chromosomes form a tetrad sister chromatids and crossover


What are segments of nonsister chromatids that break and reattach to the other chromatid?

Segments of nonsister chromatids that break and reattach to the other chromatid are known as crossover events. During meiosis, crossover events occur during prophase I and involve the exchange of genetic material between homologous chromosomes, increasing genetic diversity in offspring.


When do sister chromatids separates?

Sister Chromatids separate during anaphase.


What is the name of the structure that connects the sister chromatids?

The cell structure that joins two sister chromatids into one single chromosome is called the centromere. This is at the center of the sister chromatids.


What chromatids are attached at the centromere?

Sister chromatids are the chromatids that are attached at the centromere. Sister chromatids are two identical copies of a chromosome produced during DNA replication, and they remain attached until they are separated during cell division.


Do sister chromatids have the same genes within them?

Yes, sister chromatids have the same genes within them.


Do sister chromatids separate during mitosis?

Yes, sister chromatids separate during mitosis.


What is a cell structure that joins two sister chromatids of a chromosomes?

The cell structure that joins two sister chromatids into one single chromosome is called the centromere. This is at the center of the sister chromatids.


Which set of chromatids illustrates the result of a single crossover of the homologous chromosomes?

A single crossover of homologous chromosomes results in two chromatids that have recombined genetic material from both parents. This means that two of the chromatids will have segments from one homologous chromosome, while the other two will retain the original segments from the other homolog. Therefore, the set of chromatids illustrating this result will show two chromatids with new combinations of alleles and two chromatids with the parental combinations.


Why do sister chromatids cross over?

Sister chromatids dont over cuz they dont look it up lmfao


Do sister chromatids have the same alleles within a chromosome?

Yes, sister chromatids have the same alleles within a chromosome.


When a double helix DNA is replicated two complete helices are formed together these helices are called sister?

Sister chromatids - two copies of the same DNA joined at the centromere.