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The type of genetic disorders mainly caused by chromosomal non-disjunction is

Question

The type of genetic disorders mainly caused by chromosomal non-disjunction is

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Solution

The type of genetic disorders mainly caused by chromosomal non-disjunction are aneuploidies. These include disorders like Down Syndrome (Trisomy 21), Edwards Syndrome (Trisomy 18), Patau Syndrome (Trisomy 13), Klinefelter Syndrome (XXY), and Turner Syndrome (XO).

Here's a step-by-step explanation:

  1. Chromosomal non-disjunction is an error that can occur during meiosis, the process of cell division that produces gametes (sperm or egg cells).

  2. Normally, chromosomes are supposed to separate evenly during meiosis, so that each gamete ends up with one copy of each chromosome. However, non-disjunction occurs when the chromosomes do not separate properly.

  3. This can result in gametes that have an extra copy of a chromosome (disomy) or are missing a chromosome (monosomy).

  4. If a gamete with an incorrect number of chromosomes goes on to be involved in fertilization, the resulting zygote will also have an incorrect number of chromosomes. This condition is known as aneuploidy.

  5. Aneuploidy can cause a variety of genetic disorders, depending on which chromosome is affected. For example, having an extra copy of chromosome 21 results in Down Syndrome, while having an extra copy of chromosome 18 or 13 results in Edwards Syndrome or Patau Syndrome, respectively.

  6. Sex chromosomes can also be affected by non-disjunction. For example, individuals with Klinefelter Syndrome have an extra X chromosome (XXY instead of XY), while individuals with Turner Syndrome are missing an X chromosome (XO instead of XX or XY).

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Similar Questions

REQUIRED13.What is a good definition for non-disjunction?the exchange of genes between homologous chromosomes, resulting in a mixture of parental characteristics in offspring.the failure of homologous chromosomes or sister chromatids to separate normally during nuclear division, resulting in an abnormal distribution of chromosomes in the daughter nuclei.a change in the DNA sequence of an organism.a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.

If a child is born with a genetic disorder when neither of his biological parents have that disorder, the trait is likely to be caused by: a recessive allele on an autosome a gene on the X chromosome a dominant allele on the autosome a gene on the Y chromosome

Which of the following diseases is NOT a consequence of improper chromosome segregation? Alzheimer’s disease Down’s syndrome Turner’s syndrome None of the above

Nondisjunction of the ______ chromosome during meiosis can produce offspring that are XXX or XXY.

Which of the following is a genetic disorder caused by the presence of an extra chromosome 21?

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