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	<id>https://teaching.ncl.ac.uk/bms/wiki//index.php?action=history&amp;feed=atom&amp;title=XYY_syndrome</id>
	<title>XYY syndrome - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://teaching.ncl.ac.uk/bms/wiki//index.php?action=history&amp;feed=atom&amp;title=XYY_syndrome"/>
	<link rel="alternate" type="text/html" href="https://teaching.ncl.ac.uk/bms/wiki//index.php?title=XYY_syndrome&amp;action=history"/>
	<updated>2026-04-10T13:04:37Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://teaching.ncl.ac.uk/bms/wiki//index.php?title=XYY_syndrome&amp;diff=11336&amp;oldid=prev</id>
		<title>130348212 at 12:15, 22 October 2014</title>
		<link rel="alternate" type="text/html" href="https://teaching.ncl.ac.uk/bms/wiki//index.php?title=XYY_syndrome&amp;diff=11336&amp;oldid=prev"/>
		<updated>2014-10-22T12:15:09Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 12:15, 22 October 2014&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;XYY syndrome, also known as Jacob&#039;s syndrome, is a condition which affects only males and is where they have an extra [[Y chromosome|Y chromosome]]. The cause of XYY syndrome is due to a mistake in cell division during the&amp;amp;nbsp;production of the male&amp;amp;nbsp;sex cell, the&amp;amp;nbsp;[[Sperm cell|sperm cell]], leading to 47 chromosomes rather than the normal amount of 46.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;XYY syndrome, also known as Jacob&#039;s syndrome, is a condition which affects only males and is where they have an extra [[Y chromosome|Y chromosome]]. The cause of XYY syndrome is due to a mistake in cell division during the&amp;amp;nbsp;production of the male&amp;amp;nbsp;sex cell, the&amp;amp;nbsp;[[Sperm cell|sperm cell]], leading to 47 chromosomes rather than the normal amount of 46.&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;amp;nbsp;&lt;/ins&gt;Jacob&#039;s syndrome is a rare disease, effecting 1 in 1000 new-born male babies.&amp;amp;nbsp;Although there&#039;s a chance that sufferers of the condition are slightly taller than average,&amp;amp;nbsp;they show no&amp;amp;nbsp;physical abnormalities. Whilst there usually isn&#039;t any&amp;amp;nbsp;physical defects, many of the sufferers have learning difficulties, specifically in speech&amp;amp;nbsp;and motor skills&amp;lt;ref&amp;gt;http://ghr.nlm.nih.gov/condition/47xyy-syndrome&amp;lt;/ref&amp;gt;.&amp;lt;br&amp;gt;  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Jacob&#039;s syndrome is a rare disease, effecting 1 in 1000 new-born male babies.&amp;amp;nbsp;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;amp;nbsp; &lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Although there&#039;s a chance that sufferers of the condition are slightly taller than average,&amp;amp;nbsp;they show no&amp;amp;nbsp;physical abnormalities. Whilst there usually isn&#039;t any&amp;amp;nbsp;physical defects, many of the sufferers have learning difficulties, specifically in speech&amp;amp;nbsp;and motor skills&amp;lt;ref&amp;gt;http://ghr.nlm.nih.gov/condition/47xyy-syndrome&amp;lt;/ref&amp;gt;.  &lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;br&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== References  ===&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== References  ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references /&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references /&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>130348212</name></author>
	</entry>
	<entry>
		<id>https://teaching.ncl.ac.uk/bms/wiki//index.php?title=XYY_syndrome&amp;diff=11221&amp;oldid=prev</id>
		<title>130348212: Created page with &quot;XYY syndrome, also known as Jacob&#039;s syndrome, is a condition which affects only males and is where they have an extra Y chromosome. The cause of XYY syndrome is ...&quot;</title>
		<link rel="alternate" type="text/html" href="https://teaching.ncl.ac.uk/bms/wiki//index.php?title=XYY_syndrome&amp;diff=11221&amp;oldid=prev"/>
		<updated>2014-10-21T15:33:44Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;XYY syndrome, also known as Jacob&amp;#039;s syndrome, is a condition which affects only males and is where they have an extra &lt;a href=&quot;/bms/wiki/index.php/Y_chromosome&quot; title=&quot;Y chromosome&quot;&gt;Y chromosome&lt;/a&gt;. The cause of XYY syndrome is ...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;XYY syndrome, also known as Jacob&amp;#039;s syndrome, is a condition which affects only males and is where they have an extra [[Y chromosome|Y chromosome]]. The cause of XYY syndrome is due to a mistake in cell division during the&amp;amp;nbsp;production of the male&amp;amp;nbsp;sex cell, the&amp;amp;nbsp;[[Sperm cell|sperm cell]], leading to 47 chromosomes rather than the normal amount of 46. &lt;br /&gt;
&lt;br /&gt;
Jacob&amp;#039;s syndrome is a rare disease, effecting 1 in 1000 new-born male babies.&amp;amp;nbsp;&amp;amp;nbsp; &lt;br /&gt;
&lt;br /&gt;
Although there&amp;#039;s a chance that sufferers of the condition are slightly taller than average,&amp;amp;nbsp;they show no&amp;amp;nbsp;physical abnormalities. Whilst there usually isn&amp;#039;t any&amp;amp;nbsp;physical defects, many of the sufferers have learning difficulties, specifically in speech&amp;amp;nbsp;and motor skills&amp;lt;ref&amp;gt;http://ghr.nlm.nih.gov/condition/47xyy-syndrome&amp;lt;/ref&amp;gt;. &lt;br /&gt;
&lt;br /&gt;
&amp;lt;br&amp;gt;&lt;br /&gt;
&lt;br /&gt;
=== References  ===&lt;br /&gt;
&lt;br /&gt;
&amp;lt;references /&amp;gt;&lt;/div&gt;</summary>
		<author><name>130348212</name></author>
	</entry>
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