Yes, there are sibling DNA tests that are available without the fathers DNA. It is more acurate if you are able to involve other family members also.
I'm finding mixed results and no real confirmation. The things I'm finding are saying that they aren't sisters, but they may be related another way, however it doesn't state how.
She had a sister called Mary who is generally assumed to have been older and a younger brother called George.
Spanish: hermanas French: soeurs German: Schwestern Italian: sorelle
sisters
Sisters - 1991 Different 3-19 was released on: USA: 27 February 1993
Brothers and sisters are not identical because they have different combinations of alleles.
Maybe they are bored of the same sex and do things different
They are sisters but different in personality.
put them in different rooms
he has a different realationship
The size and the different cultures.
Yes. Only identical twins look alike; full sisters (and fraternal twins) can look completely different since they take their inherited charachteristics from both parents, who can be of totally different appearances.