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chromosomal nondisjunction causes

A 38-year-old member asked:
Dr. Thomas Riney
36 years experience Pediatrics
Hundreds at least: We only know about a few hundred, probably thousands possible as each human is unique as are their choomasome array.

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A 46-year-old member asked:
Dr. Mahmoud Shoib
12 years experience Internal Medicine
Down syndrome: It causes a genetic disorder called down syndrome.
A 37-year-old member asked:
Dr. Howard Schneider
33 years experience Pediatric Dentistry
No, many reasons: Most diseases are caused by infectious agents (viruses, bacteria, fungus, molds, parasites). Some are caused by environmental toxins and some are by d ... Read More
A 47-year-old member asked:
Dr. Matthew Fero
30 years experience Medical Oncology
Chromosomes 9 and 22: ...are abnormally spliced together in most cases of CML forming a characteristic translocation referred to as the Philadelphia chromosome. At the mole ... Read More
A 56-year-old member asked:
Dr. Osman Farooq
19 years experience Pediatric Neurology
Trisomy 21: Down syndrome is also called trisomy 21. That means that there is a partial or complete third copy of the chromosome 21. It is the most common chrom ... Read More
A 47-year-old member asked:
Dr. Michael Sparacino
36 years experience Family Medicine
See your doctor: Have your doctor refer you to a genetic counsellor.
A 53-year-old member asked:
Dr. Edward Kuhnley
44 years experience Child Psychiatry
FGFR3 gene: Achondroplasia is a mutation in the fibroblast growth factor receptor 3, which is an inhibitor that regulates bone growth. In cases of achondroplasia, ... Read More
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A 39-year-old female asked:
Dr. Jane Van Dis
17 years experience Obstetrics and Gynecology
A few things: Often genetic abnormalities arise spontaneously. Some are due to genetic problems that are passed down in family lines. Some are due to the way the ch ... Read More
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A 37-year-old member asked:
Dr. Marilynn Frederiksen
46 years experience Maternal-Fetal Medicine
Chromosomal: Chromosomes are the packaging for the genes. Genes are made up of dna. Chromosomal abnormalities are extra chromosomes, deletions, duplications, or tr ... Read More
A 38-year-old member asked:
Dr. Nikolaos Zacharias
25 years experience Maternal-Fetal Medicine
Non-disjunction.: The majority of cases of the lethal patau or trisomy 13 syndrome are caused by nondisjunction (47, +13) related to advanced maternal age. Robertsonian ... Read More
A 47-year-old member asked:
Dr. Gurmukh Singh
48 years experience Pathology
Can be either: Genetic defects responsible for disorders can be on any chromosome.
A 42-year-old member asked:
Dr. Payam Mehranpour
22 years experience Cardiology
Chromosome 20: The syndrome results from microdeletion of the 20p12 gene corresponding to jag1 gene and is inherited in an autosomal dominant pattern.
A 48-year-old member asked:
Dr. Kristi Woods
22 years experience Pediatrics
1in 1000: According to the national institute of health.
A 39-year-old female asked:
Dr. Johanna Fricke
49 years experience Developmental and Behavioral Pediatrics
A genetic accident: During formation of the egg or sperm can leave out an x chromosome in either one. A fetus whose genetic make-up includes the germ cell missing a chr. ... Read More
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A 36-year-old member asked:
Dr. Mark Diamond
45 years experience Pediatrics
No: Does not appear to.
A 51-year-old member asked:
Dr. Michael H. T. Sia
30 years experience Pediatrics
Missing genes.: Rare condition caused by missing genes. Parents may not have a family history of the condition. Cause is random. Occurs in 1:8, 000 births.
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A 41-year-old member asked:
Dr. Alan Ali
Dr. Alan Ali answered
31 years experience Psychiatry
Moyamoya: Chromosome 17
A 42-year-old member asked:
Dr. Gurmukh Singh
48 years experience Pathology
More than one x: It is a genetic anomaly in which a phenotypic male has more than one x chromosome, in addition to the y chromosome. The disorder is associated with p ... Read More
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A 51-year-old member asked:
Dr. Quresh Khairullah
41 years experience Nephrology and Dialysis
See below: Homocystinuria is a genetic disorder which affects the metabolism of the aminoacid methionine. It is inherited as a autosomal recessive trait trait, i ... Read More
A member asked:
Dr. Charlene Sojico
40 years experience Pediatrics
Neither: It is a birth defect caused by drinking alcohol during pregnancy
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A 54-year-old member asked:
Dr. TRUC DAO
Dr. TRUC DAO answered
36 years experience Psychiatry
Fetal alcohol: Not a gene to cause it. Just the amount of alcohol imbibed during the pregnancy that damage the fetus.
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A 46-year-old member asked:
Dr. Marilynn Frederiksen
46 years experience Maternal-Fetal Medicine
Males: Well, klinefelter's syndrome caused by an extra x chromosome only affects males. Extra y chromosomes only affect males.

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