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Yes they are attached at the centromere and remain identicle until crossing over occurs in prophase 1 of meosis
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoYes, before crossing over, sister chromatids are identical.
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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.
Which phase of meiosis occurs right after crossing over?
Before crossing over, interphase I takes place. Crossing over occurs during prophase I. Metaphase I occurs after prophase I.
When occurs between nonsister chromatids genetic exchange between chromosomes provides new combinations of genes that are different from the parent cell?
crossing over
What occurrence happens when meiosis crosses over?
Crossing over occurs during prophase I of meiosis. During crossing over, segments of the chromatids of homologous chromosomes trade places, so that each chromatid will contain DNA from both parents.
Crossing over occurs in?
Each chromatid can synapse with any one it want/chooses.
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.
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 occurs when chromatids exchange some DNA and this results in genetic variety?
crossing-over occurs and random fertilization
Chromosomes during prophase are made up of two identical strands What are these strands called?
The two identical strands of a chromosome are called chromatids. DNA replication occurs in the interphase stage of the cell cycle.
The exchange of genetic material between chromatids is called?
Crossing over is the exchange of genetic material between chromatids. This is also known as synapsis, and it occurs during prophase one of meiosis.
Why are two sperm never identical?
No two sperm cells are identical because of the process of crossing over that occurs in prophase I of meiosis.
Why are two sperm cells never identical?
No two sperm cells are identical because of the process of crossing over that occurs in prophase I of meiosis.
What are the two strands of a chromosome called?
The two identical strands of a chromosome are called chromatids. DNA replication occurs in the interphase stage of the cell cycle.
Which phase of meiosis occurs right after crossing over?
Before crossing over, interphase I takes place. Crossing over occurs during prophase I. Metaphase I occurs after prophase I.
When occurs between nonsister chromatids genetic exchange between chromosomes provides new combinations of genes that are different from the parent cell?
crossing over
Why crossing over occurs?
Usually,crossing over occurs to create new species of life.In the case of chromosomes,2 non sister chromatids link up at chiasmata and crossover.Crossing over usually leads to evolution of new species.
What occurs in meiosis but not in mitosis?
The crossing over of the chromosomes.Synapsis of Homologous chromosomes does not occur in Mitosis.In Meiosis, occurs during Prophase I along with crossing over between non sister chromatids; resulting chiasmata hold pairs together due to sister chromatid cohesion.
