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Showing posts with label genetic code. Show all posts
Showing posts with label genetic code. Show all posts

Wednesday, April 8, 2026

Following the Science on the Issue of Fetal Personhood

    

 This is in response to Wesley Smith’s National Review post, “Medical Journal Screed

Decries All Fetal Personhood Laws,” 18 October 2025.

When does a developing fetus becomes “human?”  Does human life begin at conception

or sometime later in the pregnancy? When, later in the pregnancy? What if you are wrong

about your dating by even a few days? Could you mistakenly be ending a human life because it

does not meet your assigned definitions? Does the developing fetus have legal rights as a

person or are they/is it not yet human? Is it not obvious that an ectopic pregnancy is a

miscarriage and that it becomes a triage situation and therefore, not an abortion?

The overall conversation is seen by many as a religious question, and it is, but a rational

and scientific case can be made for opposition to abortion without any resort to religious

arguments.  Many people will not listen to anything even remotely religious, but they might

 listen if the discussion can be framed in a scientific way.

            We have often been told to "follow the science." This is a good and valid idea. In order to

remain completely uniform in thought, this advice should be consistently applied. This article

will present, in a highly simplified way, the scientific information necessary for a case against

abortion and some forms of birth control.

This is a very simplified presentation of human conception and the passage of genetic

information from the parents to the offspring. The information may seem to be complicated and

overwhelming, but at least a simplified basic understanding is necessary for a scientific critique

of the practice of abortion. That is what I will attempt to provide for you here.  It is necessary to

start at the beginning.

DNA (deoxy-ribonucleic acid) is a molecule consisting of two strands of nucleotide

bases (adenine, guanine, cytosine, and thymine) paired together in two long strings arranged in

 the shape of a helix.  DNA, a very complex and, at the same time, a very elegantly simple

 molecule, is present in every cell of the human body and contains, in coded form, all the

information necessary to build and maintain the entire body.

Combinations of the four bases in pairs contain the entire human genome; the genetic

code which determines a person's sex, hair color, voice, skin color, height, body type, number of

fingers and toes, fat distribution, eye color, genetic diseases, intelligence level, possible allergies,

digestion, athletic ability, blood group typing, etcetera, etcetera, etcetera. The codes literally

determine everything about your physical body and genetic science clearly says that all the

information about you as a human individual is present from the moment of conception.

A very simplified explanation is this: each spermatozoan carries 23 chromosomes

containing copies of the father’s DNA and each egg cell contains 23 chromosomes containing

copies of the mother’s DNA. At fertilization, the two sets of chromosomes unite to produce the

zygote which has a total of 46 chromosomes (23 from the father and 23 from the

mother). There are, of course, abnormal situations when this process is distorted and birth

abnormalities result.

So, half of the individual’s genetic information comes from the mother and half from the

father. The chromosomal pattern in the fertilized egg is a hybrid of the coded instructions

present in each of the two source cells, made from them but individually different from each of

them; a fully separate genetic code, a totally distinct individual. To the mother’s immune

system, the fertilized egg is “Not Me,” it is a foreign body.   

The human female produces ova (eggs) which her body recognizes as "Me." Except in

rare cases of autoimmune disease, such as in immune oophoritis, the immune system leaves

the ovaries and the eggs alone. In autoimmune oophoritis, the body's immune system attacks

the ovaries as being “Not Me” and causes ovarian inflammation, severe damage, and fibrosis.

            Normally, when a sperm wins the frantic race to the egg, the egg immediately allows

the spermatozoan to enter and mix the DNA which it carries with the DNA which is present in

 the egg.  The resultant mixture of chromosomes is "Not Me," which presents a severe problem

because, if the body’s immune system is functioning properly it does not like "Not Me" and it

begins to makes moves to get rid of the "Not Me." It attacks "Not Me" to protect itself from

viruses, bacteria, and other organisms like yeast or protozoa. This is the reason why transplant

patients must take anti-rejection drugs for the rest of their lives. The transplanted tissues are

"Not Me" and would be killed if the body’s defenses are not properly suppressed.

To protect itself, the fertilized egg starts making proteins which tell the body, "move

on, there's nothing to see here." The proteins serve to hide the "Not Me." The body only sees

the "Me" and leaves the transplanted tissues alone.

Once the embryo implants and begins to increase in size, it rapidly becomes too "Not

Me" for the immune system to ignore, so the placenta takes over, releasing hormones, such as

progesterone, human chorionic gonadotropin, and other factors, to prevent rejection of the

fetus.

            The placenta is a temporary organ which contains both maternal and fetal tissue. Most

people recognize that the placenta nourishes the fetus, provides the fetus with oxygen, and

allows in some of the mother’s protective antibodies since the fetus’ immune system is not yet

functioning. It also allows the fetus’ waste products out into the mother’s blood system where

 they can then be properly eliminated. What people may not realize is that the placenta also

acts as a barrier and filter between the mother “Me” and the fetus “Not Me,” protecting the

“Not Me” from being killed. 

            Because of the placenta’s construction, the fetus and the mother effectively never come

into contact with one another.  Under the best of circumstances, the two bloodstreams never

mix. There are even two different types of hemoglobin at play, adult and fetal. The mother and

the fetus may also have different blood serotypes.

Remember that the fetus is "Not Me, " foreign tissue to the body of the mother. So,

what you have is, mother ("Me") and fetus ("Not Me"). Because the fetus has been effectively

disguised, the mother’s immune system, under normal situations, does not attempt to kill the

foreign material, the developing baby. 

This scientific information is one reason why there is so much controversy over when the

fetus becomes a separate, individual, and legally protected human, but this argument will not

convince everyone. The fertilized egg is clearly human tissue and is clearly genetically distinct

from tissue derived from the mother. None of this can answer the question of whether human

life legally begins at conception, at the first detectable heartbeat, or later.

Thirty-eight of the United States recognize the “unborn child” as a human and, in 2004,

United States President George W. Bush signed the Unborn Victims of Violence Act which views

unborn children as humans if they are injured or killed during the commission of specific federal

crimes such as terrorism. The United States courts have declared that these laws do not apply

to legal abortions.  My question is, “Why not?”  Is the only difference that the murdered child is

wanted and the aborted child is not? 

.......................................................................................................................................................
If you wish to know more, see these links.

Very good:

http://www.google.com/imgres?imgurl=http://www.ucmp.berkeley.edu/glossary/gloss3/DNA2.gif&imgrefurl=http://www.ucmp.berkeley.edu/glossary/gloss3/dna.html&h=543&w=351&sz=42&tbnid=8CP_Dkmi3Hub9M:&tbnh=84&tbnw=54&prev=/search%3Fq%3Dimage%2B%2526%2BDNA%26tbm%3Disch%26tbo%3Du&zoom=1&q=image+%26+DNA&usg=__DNAoHOES8pL7lQS_Oaj3PGM13so=&hl=en&sa=X&ei=uDw6UOT9OY2s8QTIrYG4AQ&ved=0CCMQ9QEwBA

            Kent, Athol, “Why Doesn’t a Mother Reject Her Fetus?” Reviews in Obstetrics and Gynecology, 2009, Winter, : 2(1): 67-68. This web page is from the Journal Article Summary Service of the National Library of Medicine and is published by the National Institutes of Health. https://pmc.ncbi.nlm.nih.gov/articles/PMC2672992/  (A quotation from this article, “It is a wonder of pregnancy that the fetus is not rejected by the mother’s immune system.”)

………………………………………………………………………………………………………………………………………..

 Simplified:

http://en.wikipedia.org/wiki/DNA

………………………………………………………………………………………………………………………………………..

DNA to RNA to proteins

http://dna-rna.net/

………………………………………………………………………………………………………………………………………..

Detailed information on proteins:

http://www2.chemistry.msu.edu:80/faculty/reusch/VirtTxtJml/proteins.htm

………………………………………………………………………………………………………………………………………..

Chromosomes

http://www.google.com/imgres?imgurl=http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/D/Down.gif&imgrefurl=http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/Chromosomes.html&h=318&w=430&sz=29&tbnid=4sRt4QRwm30RKM:&tbnh=83&tbnw=112&prev=/search%3Fq%3Dimages%2B%2526%2Bchromosomes%26tbm%3Disch%26tbo%3Du&zoom=1&q=images+%26+chromosomes&usg=__9giWb2_ajTIbvehrthPPLzjuZwA=&hl=en&sa=X&ei=hkA6UJ36EoT89gS6joGwCg&ved=0CBoQ9QEwAQ

http://images.yourdictionary.com/chromosome

………………………………………………………………………………………………………………………………………..

The Unborn Victims of Violence Act (Public Law 108-212-Apr. 1, 2004

https://www.congress.gov/108/plaws/publ212/PLAW-108publ212.pdf

………………………………………………………………………………………………………………………………………..

Arguments on the Abortion Issue, For and Against

https://www.britannica.com/procon/abortion-debate/Con-Quotes

………………………………………………………………………………………………………………………………………..

Tuesday, September 4, 2012

Why Life Begins at Conception, Part 4


The sperm (from the father) and the egg (from the mother) each carry one half of the parent’s genetic information.  At fertilization, a full set of genetic information is present; the exact same full set of information which is present in every cell of the adult individual.  Between thirty and one hundred fifty million sperm compete to reach an egg after each sexual act.  Each one of these sperm carries one half of the full set of the father’s genetic information.


The fertilized egg begins almost immediately to reproduce itself. Each copy carries a  full set of genetic information; the exact same full set of information which is present in every cell of the adult individual.


The cells form a flattened disk called the blastodisc and a groove, the neural groove, develops in the middle of the disk.  The walls of the groove rise up and close together to form the neural tube.  The neural tube becomes the spinal cord.  Each cell in the structure carries a  full set of genetic information; the exact same full set of information which is present in every cell of the adult individual.

This short video is of a chicken embryo, but the process is exactly the same in the human embryo.


At each step of the baby’s development every cell in the body carries a full set of genetic information; the exact same full set of information which is present in every cell of the adult individual.   If a blind DNA analysis were to be performed on two separately submitted specimens, on the embryo and on tissue taken from the mother, the result would be this: the analysis would show two individuals who were related genetically.  

Tuesday, August 28, 2012

Why Life Begins at Conception, Part 3

(The posts in this series may not occur on consecutive days but they will make the most sense to you if they are read in consecutive order.)

This is a very simplified presentation of human conception and the passage of genetic information from the parents to the offspring.  (An aside: how can any rational, normally intelligent person see this level of complexity and order and still deny at least the possibility of an intelligent designer?)

The information may seem to be complicated and overwhelming, but at least a simplified basic
understanding is necessary for a scientific attack on abortion.  That is what I will attempt to provide for you here.  It is necessary to start at the beginning, DNA (deoxy-ribonucleic acid).

DNA is a spiral molecule consisting of two strands paired together in the shape of a helix.  DNA is present in every cell of the human body and, in every one of those cells, the DNA contains ALL the information necessary to build and maintain the entire body.

DNA is a very complex and a very simple molecule.  It basically is two strands joined by matched pairs of bases.  Only four bases (adenine, guanine, cytosine, and thymine) are used.  Combinations of these four bases contain the entire genome; the genetic code which determines a person's hair color, voice, skin color, height, body type, number of fingers and toes, intelligence level, athletic ability, etcetera, etcetera, etcetera. The code determines everything about your physical body.  Literally everything, and genetic science says that all that information about you as an individual is present from the moment of conception.

A very simplified explanation is this.  In the sperm and egg cells, each cell receives one strand of the two DNA strands.  At fertilization, the two strands join to form one complete strand.  So, half of the information comes from the mother and half from the father.  The fertilized egg then is a hybrid of the two source cells, made from them but entirely different from them;  a fully separate genetic code, a separate individual.

More in the next post.
.....................................
If you wish to know more, see these links.

Very good:
Simplified:
DNA to RNA to proteins
Detailed information on proteins:
Chromosomes

Thursday, August 23, 2012

Why Life Begins At Conception, Part 1


Over the next few days I will be posting, in several parts, on the subject, Why Life Begins at Conception.  The posts may not be on consecutive days but they will make the most sense to you if they are read in consecutive order. 

The subject has become a very hot topic in the United States because of the poorly thought out comments (I would say something more harsh except for the nature of this blog) of one of the current United States Representatives. 

The current controversy concerns abortion and certain types of contraception and the timing of when a developing fetus becomes “human.”  Does life begin at conception or sometime later in the pregnancy? Does the developing fetus have legal rights as a person?

The question is presented by many as a religious question, and it is, but a rational and scientific case can be made for opposition to abortion without any reference to religion.  Many people will not listen to a religious argument, but they might listen to a scientific one.

The posts in this series will present, in a highly simplified way, the scientific information necessary for a case against abortion and some forms of birth control.  Also, the very strong emotions of persons on both sides of the issue will be discussed.

1.     This is not, never has been, and never will be, a political blog.
2.     I am qualified to present this particular scientific information because my undergraduate degree is in biology with a concentration in developmental genetics and embryology.

Friday, July 31, 2009

DNA explained for the layman

     Human reproduction is based on the incredibly complex chemical compound known as DNA (deoxyribonucleic acid), which carries all of the genetic assembly, maintenance, and functional information for the human body, different and distinct for each individual human body, with the entire code present in every cell of the human body (except of course, the reproductive cells, which carry one-half of the genetic information.)
     The genetic information carried in DNA is coded using a sequence of four bases (adenine, guanine, cytosine, and thymine) arranged in pairs on opposing helical strands with molecular weights in the millions.  The number and sequence of base pairs enables millions of instruction to be encoded in each DNA strand.  This structure is simple and complex at the same time and its elucidation won the 1962 Nobel Prize in physiology and medicine for James D. Watson and Francis Crick.
   Strand-like paired structures (twenty three pairs of chromosomes in normal humans) found in human body cells each carry millions of coded instructions on the DNA strands of which they are constructed.  The chromosomes are duplicated when new cells are produced so that each new cell carries the same set of instructions as all others.  The two exceptions are the reproductive cells (spermatozoa and ova), which, instead of being diploid (two stranded) have only one DNA strand (haploid).   When the sperm fertilizes the egg (ovum) the individual (haploid) strands of DNA are united, producing an entirely new diploid individual related to,  but distinct from, the two source cells.  The new life can literally be said to be half from the mother and half from the father.