H
hecd2
Guest
Dear Marcia,Actually it would be easy to have only DNA from his mother, as a male configuration is XY instead of XX … so Jesus could have had all Mary’s DNA minus the arm of one X chromosome and be male.
Eve came from the side/rib of Adam, which seems potentially like Eve was a female version clone of Adam (or perhaps part Adam, part what God might have changed or added) … so why not potentially Jesus a male version clone of Mary?
Possible Jesus was half Mary (egg only) and half created by God providing a sperm or the other half of dna in some way, but I have not heard it said that Jesus received his humanity from any other source but Mary. That she is the one and only direct connection to humanity for Christ’s humanity.
It’s a liitle more complicated than this. First of all, a Y-chromosome is not an X-chromosome with a missing ‘arm’. (It seems you might think X and Y describe the’shape’ of the chromosomes - in fact X is shaped as a straight bar and Y is so short it appears almost like a dot; X and Y are just names - the sex-linked chromosomes in birds are named Z and W. The X-chromosome contains many genes in both arms that are essential for viability and that are not found on the Y-chromosome. The Y-chromosome, in turn, contains some male-linked unique genes not present on the X-chromosome many of which are essential for male sex determination. You need to have at least one X-chromosome to be alive, and you need to have a Y-chromosome to be male. The vast majority of women have two X-chromosomes and studies have shown that one X-chromosome is silenced early in development so that only one X-chromosome actually expresses protein. Now, it’s difficult to say what a human with one and a half X-chromosomes would be like - it’s possible that she could be normal (relying on her one whole X-chromosome), but it is also possible that she would not be viable. One thing that is not possible, in the absence of the sex-determining genes of the Y-chromosome is that she could be male.
Let’s look at the clone hypothesis now: well, cloning somatic cells in mammals always leads to a genetically identical copy of the original cell, including sex determination (the technique is called ‘somatic cell nuclear transfer’). If the original being, in this case the Blessed Virgin, is a woman, she has two X-chromosomes and so will her clone: it is not possible to create a Y chromosome from one of the X’s. So Jesus could not be a clone of Mary.
How about the idea that Mary provided an egg, which as all mammalian germ-line cells, is haploid, that is, containing one copy only of each chromosome? In order to fertilise that egg, normally a sperm is needed, also carrying one copy of each chromosome. Since somatic cells that form a mammalian body are diploid (contain two copies of each autosomal chromosome) and are highly intolerant of missing chromosomes, we need another haploid cell to fuse with Mary’s egg, and moreover, since Jesus was male that second germ-line cell must contain a Y-chromosome (since females entirely lack Y-chromosomes in any cell of their body). Female egg cells never contain Y-chromosomes; only male sperm contain Y-chromosomes (or rather, roughly half the sperm contain Y-chromosomes and the other half contain X-chromosomes - whether a baby is male or female depends on whether it as an X or Y containing sperm that fertilises the egg). So we are left with only two possibilities that I can see. Either Jesus is the result of the fertilisation of Mary’s egg by a male sperm or a miracle occurred and God caused Mary’s egg to be fertilised miraculously. In any case, we have to account for the appearance of a Y-chromosome in Jesus’s genetic makeup that is simply not present in Mary’s cells.
Alec
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