How many chromosomes are typically present in a person with monosomy?

Monosomy refers to the condition where an individual has only one copy of a specific chromosome instead of the usual pair. In humans, there are typically 46 chromosomes, organized into 23 pairs. Monosomy results in the loss of one chromosome from these pairs. Therefore, if a person has monosomy, they would have a total of 45 chromosomes.

The most well-known example of monosomy is Turner syndrome, where females have only one X chromosome instead of two. Thus, the correct answer reflects the typical chromosomal count in a person with monosomy, establishing that they would indeed have 45 chromosomes.