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What major chromosomal event occurs between leptonema and zygonema?
Wiki User
∙ 11y ago
After condensing into long strands in the nucleus during Leptotene/Leptonema Chromosomes line up approximately with each other into homologous pairs. Telomeres cluster at one end of the nucleus and synapsis (pairing together of the homologous chromosomes) takes place in Zygotene/Zygonema.
Wiki User
∙ 11y ago
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WHEN DO Chromosomes decondense into diffuse chromatin?
At the beginning of Prophase 1 during meiosis. It occurs in a sub-stage of Prophase 1 called Leptonema.
The structure that acts as a scaffolding for chromosomal attachment and movement is called the?
The spindle is the structure that acts as a scaffolding for chromosomal attachment and movement. This occurs during later mitotic stages.
When does a cell replicates its entire chromosomal DNA only?
The cell replicates its entire chromosomal DNA only when its about to divide.
If a piece of DNA breaks off a chromosome and attaches itself to a nonhomologous chromosome at another location what type of change has occured?
If a piece of DNA breaks off a chromosome and attaches itself to a nonhomologous chromosome at another location translocation is the type of change that has occurred. The chromosomal pieces are moved to a new location.
How does nondisjunction cause chromosomal disorders?
Nondisjunction is the disappointment of homologous chromosomes to detach accurately during meiosis. This outcomes in the creation of gametes containing a more noteworthy or lesser chromosomal sum than typical ones. Therefore the individual might create a trisomal or monosomal condition.
WHEN DO Chromosomes decondense into diffuse chromatin?
At the beginning of Prophase 1 during meiosis. It occurs in a sub-stage of Prophase 1 called Leptonema.
The structure that acts as a scaffolding for chromosomal attachment and movement is called the?
The spindle is the structure that acts as a scaffolding for chromosomal attachment and movement. This occurs during later mitotic stages.
When a child is born with a chromosomal mutation when did the mutation occurs?
during meiosis
What is meant by chromosome?
A chromosomal abnormality occurs when any of the genes that make up a human, animal, or plant has a genetic mutation.
What is the difference between genetic defects and chromosomal abnormalities?
Those terms are synonymous - but genetic defect is more likely to be used to describe a physiological deformity that results from genetics, whereas a chromosomal abnormality might not produce a visible deformity.
When does a cell replicates its entire chromosomal DNA only?
The cell replicates its entire chromosomal DNA only when its about to divide.
If a piece of DNA breaks off a chromosome and attaches itself to a nonhomologous chromosome at another location what type of change has occured?
If a piece of DNA breaks off a chromosome and attaches itself to a nonhomologous chromosome at another location translocation is the type of change that has occurred. The chromosomal pieces are moved to a new location.
How does nondisjunction cause chromosomal disorders?
Nondisjunction is the disappointment of homologous chromosomes to detach accurately during meiosis. This outcomes in the creation of gametes containing a more noteworthy or lesser chromosomal sum than typical ones. Therefore the individual might create a trisomal or monosomal condition.
Crossing over causes the offsprings to be different from the parent?
Chromosomal cross-over is what causes the offspring to be different from the parent. The chromosomal cross-over process occurs during meiosis I.
What is meant by chromosomal abnormality?
Chromosomal abnormality is a broader term, describing duplications, loss, gain etc, of a particular chromosome. More related to the structures in an ideogram.Genetic disorder is a much broader term that describes any chromosomal or genetic changes. A disease condition.
What are some chromosomal disorders?
The most common type of chromosomal disorder is the Down syndrome caused by an added copy of chromosomes 21. More common chromosomal disorders are Klinefelter's syndrome and Turnerâ??s syndrome.
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.
