19. When a chromosome undergoes a deletion mutation information is: lost added reversed repeated

## Step 1<br />A deletion mutation is a type of mutation where a part of a DNA molecule is not copied during DNA replication. This type of mutation results in the loss of genetic material.<br />## Step 2<br />In the context of chromosomes, a deletion mutation would mean that a part of the chromosome is lost. This loss of genetic material can lead to a variety of consequences, including the loss of function of the genes that were present in the deleted region.<br />## Step 3<br />The other options provided, such as adding, reversing, or repeating information, do not accurately describe a deletion mutation. These actions would result in different types of mutations, not a deletion mutation.