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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.
Wiki User
∙ 12y ago
Wiki User
∙ 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.
Wiki User
∙ 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.
Wiki User
∙ 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.
Wiki User
∙ 12y agoMonosomy
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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 each sperm produced by a male?
There are 23 chromosomes in each sperm produced by a human male.
How many chromosomes are in a human reporductive cell?
A human reproductive cell, also known as a gamete, contains 23 chromosomes. This is half the number of chromosomes found in regular body cells, which have 46 chromosomes.
How many produced chromosomes does a human body cell have?
A typical human body cell has 46 chromosomes, which are organized into 23 pairs. These chromosomes contain the genetic information that determines an individual's traits and characteristics.
How many chromosomes are in a human egg cell?
A human egg cell has 23 chromosomes, which is half the number of chromosomes found in a regular human cell. During fertilization, when the egg merges with a sperm cell, the full complement of 46 chromosomes is restored.
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?
A trisomic human cell would contain 47 chromosomes instead of the usual 46. This is because one extra chromosome is present in one of the pairs.
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.
How many chromosomes are in a human reporductive cell?
A human reproductive cell, also known as a gamete, contains 23 chromosomes. This is half the number of chromosomes found in regular body cells, which have 46 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 there in a xyy male body cell?
A male with XYY syndrome has 47 chromosomes in their body cells, instead of the usual 46 chromosomes found in most human cells. This extra Y chromosome results in the condition known as XYY syndrome.
How many produced chromosomes does a human body cell have?
A typical human body cell has 46 chromosomes, which are organized into 23 pairs. These chromosomes contain the genetic information that determines an individual's traits and characteristics.
How many chromosomes are in a human egg cell?
A human egg cell has 23 chromosomes, which is half the number of chromosomes found in a regular human cell. During fertilization, when the egg merges with a sperm cell, the full complement of 46 chromosomes is restored.
How many chromosomes are in a normal human body?
A normal human body typically contains 46 chromosomes, with 23 pairs inherited from each parent. This includes 22 pairs of autosomes and one pair of sex chromosomes (XX for females, and XY for males).
How many diploid chromosomes does a downs syndrome boy have?
47 chromosomes
How many pairs of chromosomes are there in a human skin cell production by mitosis?
In human skin cells produced by mitosis, there are 46 pairs of chromosomes, totaling 92 individual chromosomes. This is because each pair consists of one chromosome from the mother and one from the father.
