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Will a child have autism if an extra chromosome is on the 21 pair?
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∙ 13y ago
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What condition results when a child is born with extra chromosome on the twenty -first pair?
Down syndrome
What is trisomy syndrome?
In a trisomy syndrome, an extra chromosome is present so that the individual has three of a particular chromosome instead of the normal pair.
What is a chromosome pair that has a extra chromosome attached to it?
A Trisomy 1. Another said this was Down's Syndrome.
Is it true or false that the 23rd chromosome pair determines the gender of a child?
TRUE.
What causes the abnormality in chromosome numbers in people with down syndrome?
It is most commonly caused by increased maternal age.Add: It is the result of nondisjunction of the 21st chromosome pair, in which the pair fails to separate, so that one cell gets an extra copy of chromosome 21.
How many chromosomes will a zygote with trisomy have?
Meiotic nondisjunction. In meiosis I or II, chromosome pair 21 fail to separate correctly, leaving one gamete with an extra chromosome 21.
What is the term for the two sets of chromatids?
A chromosome pair, as in a pair of Chromosome 15, or a pair of Chromosome 5. Others have said Tetrad - Pls stand-by.
What gene is affected in Down Syndrome?
It is the result of a chromosomal abnormality, in which there is an extra chromsome on the chromosome 21 pair. This is call trisomy 21.
What condition results when a child is born with an extra chromosome on the third pair?
Down syndrome
Through a microscope you see an exchange of chromosome segments between chromosome pair 7 and chromosome pair 15 This condition is an example?
translocation
If a male donates a Y chromosome and the female donates an X chromosome what is the sex of the child?
We are learning new theories of gender/sexual preference every day as a result of more advanced studies. Until recently, however, it was generally accepted that a sperm with a y chromosome would produce a male child and a sperm with an x chromosome would produce a female child. Biologists have discovered that things may no longer be quite that simple in some cases. For example, traditional wisdom says that boys have an X and Y chromosome pair and that girls have an X and X pair. They have learned that in cases of gender identity, some men are born with an extra X, sometimes even two extra Xs. In such a scenario, their gender chromosomal makeup can be XXXY, weakening the Y (male) sequence enough to cause gender confusion. The same is true of girls. Sometimes, they are born with only one X in the chromosomal pair which can result in more masculine traits. But until these studies are more broadly accepted, it is fairly safe to say, that the Y half of a chromosome pair will result in a male offspring.
If a human gamete with an extra chromosome participated in fertilization with a normal human gamete what condition results?
A trisomy. Trisomies are usually fatal in all chromosome pairs except 5, 13, 21 (these cause Down syndrome), and 23 (The chromosome pair that determines gender)
