Homo chromo vs. sister; genetics

I am still confused by her example could someone help me between the difference, sorry

Homologous chromosomes are 2 physically different chromosome that have the same genes but are not genetically identical. Sister chromatids are 2 copies of a single chromosome and so are genetically identical (they also are physically attached to one another).

love these graphics… this helped me:

thank you so much!!!

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no problem!!

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