Try a DNA test with a doctor present.
Offspring who have the same parents are called siblings.
Oprah Winfrey doesn't have any siblings, (by the same parents) she was born to unwed teenage parents. Her parents never got married and I don't know if the Mother or Father had any more children.
you ask your parents or older siblings
Gough Whitlam's parents wereHarry Whitlam and Martha Maddocks. Although I don't know his siblings names.
Yes, a dog can have as many as 15 different siblings and never know them.
Such an event is highly impossible because siblings receive the same set of genes from their parents. The slight differences in their DNA is due to allelic differences and due to recombinational events. However, no such event can cause a total mismatch of the DNA of two siblings from the same parents.
Yes, they all have the same parents.
Siblings look-a-like because they all have the same parents. Siblings don't look identical to their parents, they have variation in their characteristics. The same thing happens with plants and other organisms. Unless you have an identical twin. If you have an identical twin, you both have the exact same characteristics. The cell of identical twins makes an exact same copy with the cell. The process is called 'Embryo'.
25%
We know that Sebastian had parents but we do not know their names. We also do not know if he had siblings, a wife or children.
Yes, he had parents and, possibly, siblings. Hwever, we do not know who they were.
Yes, siblings are indeed children of the same parents. The term includes brothers and sisters.