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A human cell may have more or less than 46 chromosomes as a result of nondisjunction a process in what?
Wiki User
∙ 10y ago
chromosomes fail to separate during cell division
Wiki User
∙ 14y ago
Wiki User
∙ 10y agoNondisjunction is meiosis in which there is a failure of paired homologous chromosomes to separate; results in an abnormal number of chromosomes in the daughter cells.
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How can a human with 47 chromosomes be produced?
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.
What sex chromosomes do human females have?
XX is usual, XXX and X also result in a female.
What combinition of sex chromosomes result in a male human being?
XY=male; XX=female…
How many chromosomes does a human cell that has been produced by the process of meiosis have?
After meiosis 2 in human cells are 23 chromosomes. Meiotic division occur only in reproductive cells because when spermatozoid and ovum combine they form again 46 chromosomes(23 pairs of chromosomes).
How many chromosomes are in one human cell?
46 single chromosomes which is 23 pairs of chromosomes in one human body cell.
What is the process call when a human cell may have more or less than 46 chromosomes as a result of nondisjunction?
Chromosomes fail to separate during cell division (its in the lesson)
Human sex cells have 46 individual chromosomes?
Yes, except when there is an occurrence such as nondisjunction.
How can a human with 47 chromosomes be produced?
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.
Is klinefelter's syndrome an inheritance?
It is a condition in which human males have an extra X chromosome. It is inherited when the extra X chromosome is retained because of a nondisjunction event during meiosis I (gametogenesis).
What sex chromosomes do human females have?
XX is usual, XXX and X also result in a female.
What combinition of sex chromosomes result in a male human being?
XY=male; XX=female…
How many chromosomes does a human cell that has been produced by the process of meiosis have?
After meiosis 2 in human cells are 23 chromosomes. Meiotic division occur only in reproductive cells because when spermatozoid and ovum combine they form again 46 chromosomes(23 pairs of chromosomes).
Contrast the sex chromosomes found in human females and human males?
Human females have XX chromosomes while human males have XY chromosomes.
What are the number of chromosomes in the human gamete?
There are 23 chromosomes in a human gamete
How many chromosomes in the human kidney?
there are 46 chromosomes in the human kidney
How many chromosomes are in one human cell?
46 single chromosomes which is 23 pairs of chromosomes in one human body cell.
Can a male with 48 chromosomes survive?
A human male normally has 46 chromosomes. Some configurations of 48 chromosomes would result in a viable male offspring. This individual would have a trisomy of the sex chromosomes such as XYY and also a trisomy of chromosome 21 and have Down Syndrome.
