Upon Examination of a Zygote, a Developmental Biologist Discovers That

Upon examination of a zygote, a developmental biologist discovers that it possesses 69 chromosomes. What does this indicate?

A) The zygote resulted from polyspermy (multiple fertilizations of the same oocyte) by two sperm cells
B) The zygote is a normal, healthy diploid zygote
C) Either the sperm or the egg received an extra chromosome as the result of a meiotic error
D) Either the sperm or the egg received an extra sex chromosome as the result of a meiotic error