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What does a negative blood type mean?

Answer 1

A negative blood type is one in which the D (or Rhesus) antigen is absent.

There are subgroups (sub-types) of blood in addition to the four main blood groups, A, B, AB, and O, depending on whether the D (Rh) surface antigen is present or absent.

A person expresses the D surface antigen and is Rh positive if they are genetically DD or Dd.

The D surface antigen is not expressed and the individual is Rh negative if they are genetically dd.

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Answer 2

Chloe Adams

A negative blood type means that the blood lacks the Rh factor, also known as Rhesus factor. It indicates the absence of a specific protein on the surface of red blood cells.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.