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Q: Ab equals 0 if and only if a equals 0 or b equals 0?

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6.7

Assuming that cross means 'divide' B is equal to 0

No. A times B = AB

ab = 0 if and only if (a = 0 or b = 0)

That factors to (a + 1)(a + b) a = -1, -b b = -a

C minus B equals AB

ab=1a+1b a is equal to either 0 or two, and b is equal to a

No, A+B is left as A+B AB would be A x B

Only A and AB can receive from A and O. O can only receive from O. A can only receive from A and O. B can only receive from B and O. AB can receive from A, B, AB, or O. O can donate to A, B, AB, or O. A can only donate to A or AB. B can only donate to B or AB. AB can only donate to AB.

If B is homozygous (AB, BB): AB or B is possible. If B is heterozygous (AB, iB): A, B, or AB is possible.

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