Final answer:
In the context of fertilization, the genetic composition 69 XXY refers to the presence of an extra X chromosome, leading to a condition called Klinefelter syndrome. This genetic composition can result in nonviable fetal tissue and may impact the development of the fetus.
Step-by-step explanation:
When a sperm and egg fuse during fertilization, their chromosomes combine to create a zygote with 46 chromosomes. In the case of a genetic composition of 69 XXY, it means that there is an extra X chromosome, resulting in a chromosomal condition called Klinefelter syndrome. This condition typically occurs due to nondisjunction during meiosis, where an extra X chromosome is present in the sperm or egg. It is important to note that this genetic composition can result in nonviable fetal tissue, meaning that the fetus may not develop properly and may not survive.