I am reading one answer about meiosis:
During meiosis I, the sex chromosomes separate and enter different sperm or egg cells (gametes).
I assume that sex chromosomes refer here to homologous chromosomes that experience crossing-over after meiosis that is exchange of genetical information.
Meiosis I refers here to female meiosis I and to male meiosis I. In both cases, homologous chromosomes separate resulting in haploid cells after meiosis I. These homologous chromosomes enter sperm or egg cells according to the writer, which I cannot understand, since the given chromosomes, now sister chromatids after meiosis I, do not enter physically anything, they just divide into haploid cells, gametes, after meiosis II.
What is the meaning of the word "enter" in the given sentence?
I am confused by the word "enter". I am assuming that the word refers to enter something physically which is not the case in my opinion here.