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anaphase
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Why is it pointless for sister chromatids to crossover?
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.
Crossing over takes place chromosomes do what?
When there is crossing over, then non-sister chromatids of homologous chromosomes cross and twist at the chiasmata, where genetic materials are exchanged. At each if the chiasmata, the chromatids may break and rejoin with another sister chromatid and hence 'crossing over'. So basically, the 'ends' chromatids of the chromosome cross each other, then the chromatids are torn apart from each other.
What is the connector for sister chromatids?
Centromere connects the sister Chromatids
Are sister chromatids identical before crossing over occurs?
Yes they are attached at the centromere and remain identicle until crossing over occurs in prophase 1 of meosis
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.
Why do sister chromatids cross over?
Sister chromatids dont over cuz they dont look it up lmfao
Why is it pointless for sister chromatids to crossover?
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.
What phase of meiosis do nonsister chromatids cross over?
Nonsister Chromatids Cross-over in Prophase 1
Crossing over takes place chromosomes do what?
When there is crossing over, then non-sister chromatids of homologous chromosomes cross and twist at the chiasmata, where genetic materials are exchanged. At each if the chiasmata, the chromatids may break and rejoin with another sister chromatid and hence 'crossing over'. So basically, the 'ends' chromatids of the chromosome cross each other, then the chromatids are torn apart from each other.
Why do you use non-sister chromatids to demonstrate crossing over?
Crossing over occurs between homologous chromosomes, which are not identical, as one member of each pair of homologous chromosomes comes from the mother, and one member comes from the father. Sister chromatids are identical and crossing over would have no effect.
What is the connector for sister chromatids?
Centromere connects the sister Chromatids
2. What are sister chromatids When do the separate?
In anaphase I the sister chromatids remain attached, while in anaphase II the sister chromatids separate.
When do sister chromatids separates?
Sister Chromatids separate during anaphase.
What is the role of spindle fibers in mitosis?
They pull the sister chromatids apart.
Are sister chromatids identical before crossing over occurs?
Yes they are attached at the centromere and remain identicle until crossing over occurs in prophase 1 of meosis
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 is the product crossing over?
Crossing over results in nonidentical sister chromatids of homologous chromosomes.
