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No. Having an extra chromosome is actually a genetic defect. With twins, let's assume they are identical twins, the mother has one egg cell in the fallopian tube ready to be fertilized by a sperm cell. The sperm cell fertilizes the egg cell, but that egg cell then undergoes mitosis. All of the cell contents are duplicated and the cell divides into two. You now have 2 cells with the exact DNA which are twins. In the case of fraternal twins, the mother had two separate ova in her fallopian tubes and both were fertilized by two different sperm cells.
What else can I help you with?
What is a chromosome pair that has a extra chromosome attached to it?
A Trisomy 1. Another said this was Down's Syndrome.
Compare and contrast Turners syndrome and Klinefelters syndrome?
With Turner's Syndrome, the females actually have 1 less chromosome, not an extra one or sometimes only part of the X chromosome is missing. Klinefelter's syndrome, 47, XXY, or XXY syndrome is a condition in which human males have an extra X chromosome. While females have an XX chromosomal makeup, and males an XY, affected individuals have at least two X chromosomes and at least one Y chromosome.
If a cell that undergoes meiosis later is four cells with chromosome numbers 17 17 18 and 16 what happened?
one of the sister chromatids in one of the two cells that was produced during the first division of meiosis did not separate during the second division resulting in one cell with an extra chromosome and one with a missing chromosome. This process is known as nondisjunction
How does the chromosome number in a diploid cell differ from the chromosome number in a haploid cell?
A diploid cell contains two sets of chromosomes, one from each parent, while a haploid cell contains only one set of chromosomes. In humans, a diploid cell has 46 chromosomes (23 pairs), whereas a haploid cell has 23 chromosomes.
In human which sex chromosome determines if an offspring is a male or female?
In humans, which sex chromosome determines if an offspring is a male or female?
Why is each chromosome a double?
There are 2 of each chromosome because you get 1 set from each parent.
Can people be born with two butt holes?
technically yes. But only if 1 parent gives 1 extra chromosome to the baby at birth. That 1 chromosomes causes autistic children to be the way they are
What fraction of its chromosome does an organism get from each parent?
Exactly 1/2.
Is Down syndrome a genetic disorder or a chromosome disorder?
Down syndrome is a chromosomal disorder. It is caused by having 1 extra chromosome (chromosome 21).
What is a chromosome pair that has a extra chromosome attached to it?
A Trisomy 1. Another said this was Down's Syndrome.
Which chromosome contains the sex gene?
chromosome 1 chromosome 1
How can an individual get Down Syndrome?
One does NOT GET Down's syndrome, a person is born with it. Down's syndrome occurs in the early stages of development, more commonly in older mothers. It is when there is an extra chromosome in trisomy 21. This extra chromosome is caused by a nondisjunction which is when there is a failure of one synaptic pair of chromosomes to separate during anaphase 1.
Compare and contrast Turners syndrome and Klinefelters syndrome?
With Turner's Syndrome, the females actually have 1 less chromosome, not an extra one or sometimes only part of the X chromosome is missing. Klinefelter's syndrome, 47, XXY, or XXY syndrome is a condition in which human males have an extra X chromosome. While females have an XX chromosomal makeup, and males an XY, affected individuals have at least two X chromosomes and at least one Y chromosome.
What stage of cell division would down's syndrome occur?
Down syndrome (trisomy 21) occurs when a gamete carrying an extra copy of chromosome 21 is involved in a fertilization event.The gamete (whether sperm or oocyte) has an extra copy of chromosome 21 because of something called NONDISJUNCTION. This happens when a chromosome gets pulled to the wrong daughter cell.This can happen either in meiosis I or meiosis II.If nondisjunction happens in meiosis I, 2 gametes will be n+1 (have the extra copy of 21) and the other 2 gametes will be n-1 (will have NO copy of 21)If nondisjunction happens in meiosis II, 2 gametes will be normal, one will be n+1 and one will be n-1.
If a cell that undergoes meiosis later is four cells with chromosome numbers 17 17 18 and 16 what happened?
one of the sister chromatids in one of the two cells that was produced during the first division of meiosis did not separate during the second division resulting in one cell with an extra chromosome and one with a missing chromosome. This process is known as nondisjunction
What causes downs syndrome?
When a child is diagnosed with DS, this means that they were born with an extra chromosome 21. Giving them a total of 47 rather than 46.This extra chromosome delays physical and educational development.
Is it possible to have the same DNA as someone else?
No. You have a random selection of half your father's DNA and half your mother's. Each parent puts one half of each chromosome in their sex cells, e.g. eggs or sperm. but the rest of answer is how you can identify two offspring of same parent . are they brother or not if their parent is dead.
