during meiosis
during meiosis
A trisomy is when a person has 3 versions of a chromosome. 'Normal' humans will only have 2 of each chromosome. For example, having 3 versions of chromosome 21 is known as Trisomy 21 or Down Syndrome.
During meiosis
A chromosomal mutation can occur either during the formation of the egg or sperm, or after fertilization when the zygote is forming. This means the mutation could have occurred in the parent's gametes, or during cell division in the early stages of embryo development.
These are called fatal genetic mutations. Same examples are: Tay-Sachs disease, Neimann-Pick disease, Trisomy 18 and Trisomy 13 are "Edwards Syndrome" and "Patau Syndrome," respectively and Cystic fibrosis
during meiosis
during meiosis
During meiosis
A trisomy is when a person has 3 versions of a chromosome. 'Normal' humans will only have 2 of each chromosome. For example, having 3 versions of chromosome 21 is known as Trisomy 21 or Down Syndrome.
During meiosis
During meiosis
A chromosomal mutation can occur either during the formation of the egg or sperm, or after fertilization when the zygote is forming. This means the mutation could have occurred in the parent's gametes, or during cell division in the early stages of embryo development.
A trisomy is a condition in which a person has three copies of a chromosome instead of the usual two copies. A person can have full trisomy (three copies in every cell) or mosaic trisomy (three copies in some cells but not all).
These are called fatal genetic mutations. Same examples are: Tay-Sachs disease, Neimann-Pick disease, Trisomy 18 and Trisomy 13 are "Edwards Syndrome" and "Patau Syndrome," respectively and Cystic fibrosis
nonsense mutation, missense mutation, frameshift muation, deletion or addition mutation
Trisomy 18 is caused by a type of mutation called nondisjunction, where an error in cell division results in an extra copy of chromosome 18. This leads to the presence of three copies of chromosome 18 in each cell instead of the normal two copies.
Such mutations are called point mutation or gene mutation.