When a eukaryotic cell undergoes cellular division, creating two new daughter cells - an error (nondisjunction) in the step shown BELOW can impact the number of chromosomes in the daughter cells' nuclei.

Anaphase I - Definition, Process and Quiz | Biology Dictionary

What is this step?

a
Anaphase in mitosis
b
Telophase in meiosis
c
Metaphase in mitosis
d
Prophase in endocytosis