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Which stage of meiosis causes Down syndrome?
Mistakes in meiosis may cause Down syndrome. The error happens when the chromosomes segregate into the gametes. The egg or sperm may have too many or too few chromosomes. Down syndrome has an extra chromosome in the 21st pair.
What might be the effect of inheriting more than the normal number of chromosomes in a human?
The implications of too many or too few chromosomes from the normal chromosomes are birth defects. With too many chromosomes a child could have Down Syndrome. With too few chromosomes a child could have Turner Syndrome.
Does hemophilia result from too many or too few chromosomes?
The gene for the most well known form of hemophilia is located on the X chromosome. It is not the result of too many or too few chromosomes. A male receives only one X chromosome while the receives two X chromosomes. These gene codes for factor VIII, one of the factors within the clotting cascade. If a female inherits the mutated gene, she has a second gene on the other X chromosome. However, she is capable of passing the gene for hemophilia onto her children. Males inherit one X chromosome and so have hemophilia. This is for informational purposes only and should not be construed as a complete answer.
What process takes place when a chromosome pair fails to separate correctly during meiosis?
When chromosome pairs fail to separate aneuploidy occurs due to non-disjunction. This can result in monosomy or trisomy of the chromosome. These are mistakes made in chromosome segregation during meiosis. If pairs of homologous chromosomes fail to separate during the first meiotic division or if the centromere joining sister chromatids fails to separate during the second meiotic division, gametes, and hence offspring, will be produced that have too many and too few chromosomes.If this occurs in a cell of the body that is undergoing mitosis, the body will destroy the cell. If it occurs in a gametic cell (ovum or sperm) then the result can be trisomy, which is when the offspring receives three of the same chromosome rather than the normal two. Often the embryo will abort itself if this occurs but if you end up with three copies of chromosome 21 this is known as down syndrome. One the creation of a cell with trisomy, another cell results that is missing the chromsome so it is possible to end up with gametes missing a chromosome aswell, which will usuallr cause the embryo to abort, or may lead to serious defects in the offspringThe tetrads (pairs of homologous chomosomes) split up during Anaphase I in Meiosis I.
A situation in which chromosome number can be represented as either 2n plus 1 or 2n-1 is called?
Aneuploidy: Is when an uncomplete gamete unites with a complete gamete to form an unequal value of chromosomes in the zygote. There are two forms that may exist in aneuploidy, Trisomic (2n+1) and monosomic (2n-1).An aneuploid individual has either too many or too few chromosomes, usually as a result of nondisjunction.
How can nondisjuncton result in an individual having an extra chromosome what is this called?
Yes, nondisjunction results in a germinal cell (ovum or spermatozoa) with either too many or too few chromosomes. If one of these cells joins with another to form a zygote, there may be one or more too many or too few chromosomes in the cells.
Which stage of meiosis causes Down syndrome?
Mistakes in meiosis may cause Down syndrome. The error happens when the chromosomes segregate into the gametes. The egg or sperm may have too many or too few chromosomes. Down syndrome has an extra chromosome in the 21st pair.
What can cause a nucleus to become unstable and decay?
Too many or too few neutrons.
How does over hunting cause a species population to decreas?
Too few individuals remain to reproduce
What cause the loaf of the bread to have small volume?
There are numerous factors that could cause bread not to rise. Just a few possibilities: the yeast was too old, or the dough was left to rise too long, causing the yeast to die; the oven did not hold a steady temperature; the wrong type of flour was used or the cook did not measure accurately.
Can transmission cause car to turn off?
yes, if you are doing too few revs for the gear you are in then you will stall.
What might be the effect of inheriting more than the normal number of chromosomes in a human?
The implications of too many or too few chromosomes from the normal chromosomes are birth defects. With too many chromosomes a child could have Down Syndrome. With too few chromosomes a child could have Turner Syndrome.
Does hemophilia result from too many or too few chromosomes?
The gene for the most well known form of hemophilia is located on the X chromosome. It is not the result of too many or too few chromosomes. A male receives only one X chromosome while the receives two X chromosomes. These gene codes for factor VIII, one of the factors within the clotting cascade. If a female inherits the mutated gene, she has a second gene on the other X chromosome. However, she is capable of passing the gene for hemophilia onto her children. Males inherit one X chromosome and so have hemophilia. This is for informational purposes only and should not be construed as a complete answer.
What type of eating behavior can cause heartburn?
Eating too much salt, eating spicy food, and generally eating just too much.
What are function of platelets?
The function of platelets is in clotting. Without them the blood would not clot. They are cell fragments and not cells. They live only 5-9 days. Too many platelets can cause clots that then can travel and cause blockages in vessels. Too few can cause uncontrolled bleeding.
Does feeding a horse too much hay in the stable cause colic?
Too much hay is usually not an issue if the hay is not alfalfa. Timothy and other grass hay will not normally cause colic. What may cause colic in horses is a quick change in the type of hay. If a horse is accustomed to one type of hay a quick switch to another may cause colic. It is best to switch to a new type gradually over several days.
What is the cause of the Southerners on few or no slaves?
What benefited the planters benefited them too. Also they were enthusiastic about the general idea of defending their homeland against the invader.
