The relationships here are not at all clear, but even if they were of crystalline clarity it's all but impossible to predict how likely it is that someone will "look like" someone else.
Keeping that in mind:
I'm assuming that the uncle here is the mother's (half-)brother; they have the same mother but different fathers. In that case, they'd on average be expected to share 25% of their genotype, and therefore the genotypes of the uncle and the niece would be 12.5% (1/8th) similar. That may not be a great predictor of "looks like", but I think it's probably the sort of number you were looking for. It would hardly be surprising for them to share a few similar features.
Keep in mind that those are AVERAGES. It's possible (but unlikely) for siblings to have genotypes that are significantly more or less similar than 50%, so it's theoretically possible that the uncle and niece could share a full quarter of their genotype (and that's assuming the various dads involved are aliens or something and had no genes in common with anyone else in the family).
Your mother and her sister will have around half the same DNA on average. However, averages are strange things, in theory they could share 100% ie be identical twins or they counld share none!
The masculine gender of the word "niece" is "nephew." A niece is the daughter of one's sibling, while a nephew is the son of one's sibling.
A thoughtful gift for a 14-year-old niece from a rich aunt could be a piece of jewelry like a necklace or bracelet, a designer accessory, or a gift card to her favorite store. It's also nice to consider the niece's interests and hobbies when choosing a gift.
It means that it is your uncle's daughter daughter's thing
Robert Hooke's niece was Margaret Hooke. She was the daughter of Hooke's sister, who married a man named Joseph Hooke. Margaret is noted in historical records primarily for her connection to Robert Hooke, a prominent 17th-century scientist known for his contributions to physics and biology.
Your niece would be your mothers granddaughter.
The right to complain to your father.
She is your father's aunt and your great aunt. You would be her grand niece.
It could be your father. Your niece's daughter's grandmother is your aunt. Her brother's son's father is either your father or your uncle.
Ask the father to request a modification, however you must also file against the mother.
Let's break this down:Father's mother's elder sister: your father's aunt, which makes her your great aunt.Your great aunt's son is your father's cousin. Your father's cousin's daughter is your father's niece, which is your 2nd cousin (shared great-grandparents).Father's mother = grandmotherFather's mother's (elder) sister = great-auntFather's mother's (elder) sister's son = 1st cousin once removed (father's 1st cousin)Father's mother's (elder) sister's son's daughter = 2nd cousinIt could be your daughter or niece (brother's daughter) if your great-aunt (your father's aunt) married your father. But it could not be your sister, because it's impossible for your father to be his mother's son and also his aunt's (mother's sister's) son. Unless of course there was some IVF of donated eggs, or that sort of thing.
That could be your daughter. It could also be someone with no blood relationship to you if it is actually your brother-in-law's niece. It could also be your niece and in most families you would just refer to her as a niece.
You would be a neice or nephew, neice if a girl and nephew if a guy.
Your niece's children are your great nieces and great nephews, and you are their great uncle. Your uncle could be the father of your niece, and thus the grandfather of your niece's children.
Your father's niece is your 1st cousin.
You and your father's niece are first cousins.
Let's approach this systematically. Your mother's and father's parents are your grandparents. Your mother's and father's siblings are your aunts and uncles and their children are your first cousins. The children of your first cousins are your first cousins ONCE REMOVED (thereby establishing both the relationship and generational standing) The siblings of your Grandparents are your great aunts and great uncles. Their children are your parent's first cousins. Therefore your great aunt's niece is your first cousin, once removed, or she may be your mother.