I remember one of my best friends growing up had three sisters and not one looked like the other and none of them looked like either parent. Both parents had dark hair and pale skin and were English.
Friend had jet black Afro type hair and olive skin, dark eyes...she looked very French and androgynous, tall, willowy, flat chested, very small facial features, thin lips etc. She looked like a darker skinned Harriet Walter or Tamsin Grieg.
Next sister had thick straight golden hair and blue eyes, pale skin with freckles and was short and chubby with a wide smile, full lips and a fairly big nose. She looked a bit like Lena Dunham but with blonde hair and blue eyes.
Next sister was also short and chubby with dark brown wavy hair (but still completely different hair to friend), huge dark eyes, red, full lips but different shape to sister above, same nose as sister above. She was very “Snow White” looking. Maybe like one of The Corrs sisters.
Sister four had light brown poker straight thin hair, huge blue eyes, thin lips and was absolutely tiny. Very petite build. Redish, ruddy complexion. Tiny sharp nose. Thin lips. Can’t think of anyone she looked like at the moment.
Lots of people thought they were adopted. I still look at them and their parents and can’t see any resemblance between any of them but they are all biological siblings!