Expanding the Public Sphere through Computer ... - ResearchGate

APPENDIX A. TALK.ABORTION: AUGUST 9, 1994 136
In article 35651@rs6000.cmp.ilstu.edu, rohuck@rs6000.cmp.ilstu.edu
(HUCK ROBERT O) writes:
>Bruce Cameron (bmc@mayo.edu) wrote:
>: In article 78948@rs6000.cmp.ilstu.edu, rohuck@rs6000.cmp.ilstu.edu
>: (HUCK ROBERT O) writes:
>
>: >1) It is impossible for one person to have two blood types. When a woman
>: >is pregnant, she has her blood type and the unborn child has her or his
>: >blood type. In the case of fraternal twins, there can be three different
>: >blood types.
>: >
>
>: There may only be one blood type. It is possible for a mother and
>: child to share the same blood type. Often family members are the
>: best donors for each other, as the possiblity for a match is higher
>: than that between complete strangers.
>
>But there are often two. I realize a parent and child can have the same
>blood type. My mother and I are both O+. My twin brother is O-. He was
>O- before he was born. Your point is true, but irrelevant. My point
>was that a pregnant woman and her child *can* have two different blood
>types. I did not say they *always will* have two different blood types.
>Please read exactly what I say.
>
You are trying to find evidence that there are two individuals present.
If there is only one blood type present, how do you know that there are
two individuals?
>: >2) It is impossible for one person to have 46 pairs of chromosones. When
>: >a woman is pregnant, she has the 23 pairs of chromosones she received
>: >from her parents at conception and the unborn child has his or her 23
>: >pairs (24 in the case of children with Down’s Syndrome) of
>: >chromosones.
>: >
>
>: This only says that members of a species have a fixed number of chromosomes.
>
>Exactly! Human beings have 23 pairs of chromosones, not 46. Once again,
>please read what I said. I said it is impossible for one person to have
>46 pairs of chromosones.
>
>: It says nothing about the uniqueness of the chromosomes of two individuals
>: nor does it say that chromosome number alone is the qualification
>: for inclusion
>: as a member of a specific species. Again, the question comes up: given two
>: sets of chromosomes, how different do they have to be before you say that
>: they are from two different individuals?
>
>Actually they don’t have to be different at all. Identical twins share
>the same chromosones, but they are two different individuals. In this
>case, difference is unimportant. The only important issue is number.
>
>: BTW the 23 chromosomes you have in the mitochondria in your cells is
>: identical (barring radiation or chemically induced mutations) to that
>: of your mother.
>