A mutation is the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.
mutations occur at some time during a person's life and are present only in certain cells, not in every cell in the body. These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if a mistake is made as DNA copies itself during cell division.
mutations occur at some time during a person's life and are present only in certain cells, not in every cell in the body. These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if a mistake is made as DNA copies itself during cell division.
Chromosomal Mutations
deletion the loss or absence of a section from a nucleic acid molecule or chromosome.
Duplication a DNA segment in a chromosome that is a copy of another segment.
An inversion is a chromosome rearrangement in which a segment of a chromosome is reversed end to end.
A chromosome translocation is a chromosome abnormality caused by rearrangement of parts between non homologous chromosome.
Turner syndrome is caused by a missing or incomplete X chromosome. People who have Turner syndrome develop as females. Some of the genes on the X chromosome are involved in growth and sexual development, which is why girls with the disorder are shorter than normal and have incompletely developed sexual characteristics.
Turner syndrome is caused by a missing or incomplete X chromosome. People who have Turner syndrome develop as females. Some of the genes on the X chromosome are involved in growth and sexual development, which is why girls with the disorder are shorter than normal and have incompletely developed sexual characteristics.