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This occurs due to nondisjunction, in which one or more homologous pairs of chromosomes do not separate during anaphase I, or sister chromatids do not separate properly during anaphase II of meiosis. The resulting daughter cells (gametes) will have either 22 or 24 chromosomes. If the gamete with 22 chromosomes unites with a normal gamete with 23 chromosomes, the offspring will have 45 chromosomes (23 + 22). If the gamete with 24 chromosomes unites with a normal gamete, the offspring will have 47 chromosomes (23 + 24). These are usually lethal conditions.
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∙ 11y ago
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∙ 12y agoIf one of the parent's homologous chromosomes did not separate, and therefore their gamete contained 24 chromosomes instead of the normal 23 - this would produce an offspring with 47 chromosomes.
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∙ 11y agoThis can happen through nondisjunction. During Meiosis the chromosomes do not split apart properly, and the end result is a gamete with too many chromosomes. If a human has a gamete with two many chromosomes then it is possible that it will have 47 chromosomes instead of the normal 46. A human with 47 chromosomes has a gamete with 2N+1 instead of the normal 2N.
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∙ 9y agoA human can get more than 46 chromosomes by an accident in the egg or sperm. When this happens it is present in every cell of the body. Some of these abnormalities can be inherited.
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∙ 14y agoHumans have 46 total chromosomes
They have 23 pairs of homologous chromosomes. 22 pairs are autosomal chromosomes and 1 pair is sex-linked.
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∙ 11y agoAnswer: Each parent gives 23 chromosome and makes 46 chromosomes, if the baby doesn't have 46 chromosomes it may end up deaf or blind, etc.
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∙ 12y agoMonosomy
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How many chromosomes are in each sperm produced by a male?
There are 23 chromosomes in each sperm produced by a human male.
How many chromosomes are present in each cell in this human?
There are 46 chromosomes in a normal human cell and 23 in the sex cells. People with down syndrome has 47 chromosomes.
How many chromosomes are in a human reporductive cell?
There are 46 chromosomes in a human cell, half come from your mother and half come from your father. However a person with down syndrome has 47 chromosomes.
What chromosome is abnormal in a human karyotype?
when the chromosomes is 47 or less than 46
How many produced chromosomes does a human body cell have?
Humans have 46 chromosomes. This means they will produce sex-cells (sperm and ovum/egg) which have 23 chromosomes.
How many chromosomes are in each sperm produced by a male?
There are 23 chromosomes in each sperm produced by a human male.
How many chromosomes are present in each cell in this human?
There are 46 chromosomes in a normal human cell and 23 in the sex cells. People with down syndrome has 47 chromosomes.
How many chromosomes would a Trisomic human cell contain?
Normal human diploid cells contain 46 chromosomes.
How many chromosomes are in a human reporductive cell?
There are 46 chromosomes in a human cell, half come from your mother and half come from your father. However a person with down syndrome has 47 chromosomes.
What chromosome is abnormal in a human karyotype?
when the chromosomes is 47 or less than 46
How many produced chromosomes does a human body cell have?
Humans have 46 chromosomes. This means they will produce sex-cells (sperm and ovum/egg) which have 23 chromosomes.
How many chromosomes are in a human zygote which has Down Syndrome?
Human cells have 23 pairs of chromosomes, giving a total of 46 per cell.
The number of chromosomes found in human body cells is?
46 chromosomes or 23 pairs of chromosomes.
How can people with Down's Syndrome ovulate although they have 47 chromosomes not 2N?
They cannot. They can experience menstruation, but there is no ovum produced.
How many chromosomes are in a normal human body?
46.The cells of the human body, for example in the liver, brain, and muscles, contain two sets of chromosomes, and are called diploid. There are 23 chromosomes in each set, and we inherit 23 from each parent.
How many chromosomes are in a human egg cell?
Twenty-three chromosomes are in a human egg cell. 22 are autosomes, the other is an X chromosome.
How many chromosomes are in each cell formed after mitosis?
Mitosis produces daughter cells with the same number of chromosomes as the original cell - so human cells produced by mitosis will have 46 chromosomes.
