The invention relates to carrier screening and methods for describing a structural variant, such as a large rearrangement or chromosomal abnormality, in a person's genome using probes that are designed to determine the person's genetic sequence and reveal substitution mutations and small structural variants. Identifying a structural variant may include exposing a nucleic acid to a plurality of probes. Each probe has a linked pair of targeting arms designed to hybridize upstream and downstream of a target in a genome. The method includes hybridizing two of the probes to the nucleic acid and attaching the two probes together to create an inter-probe product as well as detecting the inter-probe product and reporting a structural variant of the genome in the nucleic acid.