AP BIOLOGY

Detailed explanation-1: -When deleted chromosome segment is attached to its normal homologous chromosomes it causes duplication. Here some genes or many genes are replicated twice or more times in the same chromosome and this is known as duplication. Was this answer helpful?

Detailed explanation-2: -Structural chromosome abnormalities occur when part of a chromosome is missing, a part of a chromosome is extra, or a part has switched places with another part. Ultimately, this leads to having too much or too little genetic material. This is a cause of some birth defects.

Detailed explanation-3: -Deletions. Deletions occur when a chromosome breaks and some genetic material is lost. Deletions can be large or small, and can occur anywhere along a chromosome.

Detailed explanation-4: -duplication. A type of mutation where a chromosome segment is repeated so that the individual has more than two alleles for certain traits is called duplication.

Detailed explanation-5: -–Tandem duplications are adjacent to each other. –Reverse tandem duplications result in genes arranged in the opposite order of the original.