So God created man in his own image, in the image of God created he him; male and female created he them. Genesis 1:27
"A book published back in 2003 titled Adam’s Curse: A Future
Without Men by Bryan Sykes predicted that in the future “the human race will reach the ultimate evolutionary crisis that has been millions of years in the making: The extinction of men.”
His prediction is that the Y chromosome will disappear, resulting in the extinction of males as we know them. Is this what is happening really?
The XY chromosome in the fertilized egg produces a male, and XX, even XO (Turners Syndrome) or XXX (trisomy X), all produce females. Likewise, one Y always produces a male.
One headline supporting the disappearance opinion proclaimed, The Y chromosome is disappearing – so what will happen to men?
The report added, although the Y chromosome
cited declared, “Study Dispels Theories Of Y Chromosome’s Demise.”
A key fact is, in the present day, the Y chromosome is a comparatively tiny structure, about 45 total genes compared to around 1,000 on the X.
Isobel Whitcomb announced the old fear in a new article in Live Science on August 30, 2020. Once again, she raised the suggestive question, “Is the Y chromosome dying out?” She added, “The Y chromosome may be in trouble.”
She starts with the well-known fact that if you have two X chromosomes you normally develop ovaries, and if you have an X and Y chromosome, you normally develop testes. She then admits that research only suggests it has shrunk over time. Then she calls on evolutionary geneticists who begin their habit of storytelling:
And yet another study contradicted this claim, concluding, “A comparison of Y chromosomes in eight African and eight European men dispels the common notion that the Y’s genes are mostly unimportant and that the chromosome is destined to dwindle and disappear.”
One reason for their conclusion was a finding that the worldwide
genetic variation on the Y chromosome was very small compared to the comparatively large variety seen in the DNA of the non-sex chromosomes. The researchers believe that the large similarity of the Y chromosome in humans is evidence that the specific Y chromosome genes—although small in number—are very important for functions besides determining sex.
The authors found that mutations are more prone to damage the 27 unique genes in the Y chromosome than in somatic chromosomes.
That is because the Y chromosome has no mate, thus recombination with another Y cannot occur as it does with all other chromosomes. Furthermore, as a result, “all sites on the Y are effectively linked together. Thus, selection acting on any one site will affect all sites on the Y indirectly.”
Evolutionists believe the Y is shrinking because of mutations.
They know that “genes develop mutations, many of which are harmful.” Meiosis separates the chromosome pairs and one way of reducing the mutational load is by recombination. This occurs when paternal and maternal chromosomes randomly mix and match, again forming chromosomal pairs. For several reasons, this process makes it more likely that only functional DNA copies will be passed on to the offspring. All chromosomes including the X (for the female XX) take part in this recombination except the Y chromosome, because the Y does not have a swapping companion: thus crossing over is normally not possible. Y and X chromosomes, moreover, are not similar enough to recombine.
Several salient points stand out. The first is that the literature flip-flops on the question of whether the Y chromosome is shrinking. Only a small sample of articles and papers was referenced here. One says the Y chromosome is shrinking and will eventually disappear. Another argues it is not shrinking and will, as a result, not disappear.
Darwinism gave birth to evolutionary imagination that is used to
interpret the world, and all life in it. Evolutionists use their imaginations to envision an old, slowly-evolving world, accumulating rare beneficial mutations over hundreds of millions years that are preserved by positive natural selection, while dispensing with obsolete genetic material through negative natural selection.
Usually the big problem is ignored, namely, the evolution of sex itself, and its complex systems of chromosomes, meiosis, recombination and other processes designed to produce offspring that are a blend of their parents. This, F. Lagard Smith described in 2018, is “Evolution’s fatal flaw.”
CEH
"A book published back in 2003 titled Adam’s Curse: A Future
His prediction is that the Y chromosome will disappear, resulting in the extinction of males as we know them. Is this what is happening really?
The XY chromosome in the fertilized egg produces a male, and XX, even XO (Turners Syndrome) or XXX (trisomy X), all produce females. Likewise, one Y always produces a male.
One headline supporting the disappearance opinion proclaimed, The Y chromosome is disappearing – so what will happen to men?
The report added, although the Y chromosome
carries the “master switch” gene, SRY, that determines whether an embryo will develop as male (XY) or female (XX), it contains very few other genes and is the only chromosome not necessary for life. Women, after all, manage just fine without one.Another headline published at about the same time as the one just
A key fact is, in the present day, the Y chromosome is a comparatively tiny structure, about 45 total genes compared to around 1,000 on the X.
Isobel Whitcomb announced the old fear in a new article in Live Science on August 30, 2020. Once again, she raised the suggestive question, “Is the Y chromosome dying out?” She added, “The Y chromosome may be in trouble.”
She starts with the well-known fact that if you have two X chromosomes you normally develop ovaries, and if you have an X and Y chromosome, you normally develop testes. She then admits that research only suggests it has shrunk over time. Then she calls on evolutionary geneticists who begin their habit of storytelling:
“Our sex chromosomes weren’t always X and Y,” said Melissa Wilson, an evolutionary biologist at Arizona State University. “What determined maleness or femaleness was not specifically linked to them.” When the very first mammals evolved between 100 and 200 million years ago, they didn’t have any sex chromosomes at all. Instead, the X and Y were just like any other set of chromosomes — identical in size with corresponding structures…. animals don’t need sex chromosomes.Then, Whitcomb claims, “The only special feature of the Y chromosome is one gene, SRY, which acts as an on-off switch for the development of testes.”
And yet another study contradicted this claim, concluding, “A comparison of Y chromosomes in eight African and eight European men dispels the common notion that the Y’s genes are mostly unimportant and that the chromosome is destined to dwindle and disappear.”
One reason for their conclusion was a finding that the worldwide
The authors found that mutations are more prone to damage the 27 unique genes in the Y chromosome than in somatic chromosomes.
That is because the Y chromosome has no mate, thus recombination with another Y cannot occur as it does with all other chromosomes. Furthermore, as a result, “all sites on the Y are effectively linked together. Thus, selection acting on any one site will affect all sites on the Y indirectly.”
Evolutionists believe the Y is shrinking because of mutations.
They know that “genes develop mutations, many of which are harmful.” Meiosis separates the chromosome pairs and one way of reducing the mutational load is by recombination. This occurs when paternal and maternal chromosomes randomly mix and match, again forming chromosomal pairs. For several reasons, this process makes it more likely that only functional DNA copies will be passed on to the offspring. All chromosomes including the X (for the female XX) take part in this recombination except the Y chromosome, because the Y does not have a swapping companion: thus crossing over is normally not possible. Y and X chromosomes, moreover, are not similar enough to recombine.
Several salient points stand out. The first is that the literature flip-flops on the question of whether the Y chromosome is shrinking. Only a small sample of articles and papers was referenced here. One says the Y chromosome is shrinking and will eventually disappear. Another argues it is not shrinking and will, as a result, not disappear.
Darwinism gave birth to evolutionary imagination that is used to
Usually the big problem is ignored, namely, the evolution of sex itself, and its complex systems of chromosomes, meiosis, recombination and other processes designed to produce offspring that are a blend of their parents. This, F. Lagard Smith described in 2018, is “Evolution’s fatal flaw.”
CEH
