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No, it is normal for chromosomes to cross over. Crossing over is how we humans have genetic diversity.

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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.


Is marfan syndrome a chromosomal abnormality?

No, Marfan syndrome is not a chromosomal abnormality. It is a genetic disorder caused by a mutation in the fibrillin-1 (FBN1) gene, which affects the body's connective tissue. This gene is located on chromosome 15.


The exchange of parts between non homologous chromosomes...?

is known as chromosomal translocation. This process can lead to genetic disorders if it disrupts the normal function of genes located on the chromosomes involved. Chromosomal translocations can be balanced, in which case they may have no noticeable effect, or unbalanced, which can result in various health issues.


Which type of chromosomal abnormalities is most likely to be viable in humans?

Trisomy 21 (Down syndrome) is the most common type of chromosomal abnormality that is viable in humans. Individuals with Down syndrome have an extra copy of chromosome 21, which can result in distinctive physical characteristics and developmental delays, but many individuals with Down syndrome lead healthy and fulfilling lives.


What is the longest phase in meiotic division?

The longest phase in meiotic division is prophase I. This phase involves significant chromosomal changes, including crossing over and genetic recombination, which contribute to genetic diversity. It is divided into subphases: leptotene, zygotene, pachytene, diplotene, and diakinesis.