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MrNiceGuy7
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As a male my X chromosome comes from my mom and Y from my dad. This same Y chromosome comes from his dad and so on. Does this mean that I essentially have none of the genes or hereditary lineage of the women in his line?

i would assume no, but since the Y chromosome I have came from his father and the X from someone on my mother's line I don't see what I could have from, say, my dad's mom.

i sent this as a PM to joie but i'm pretty curious.

6/29/2009 11:33:14 AM

thumper
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Your dad's Y chromosome is made up of his mom's X and his dad's Y. So essentially you're getting both your dad's parent's genes when you get his Y chromosome.

That sounds right, but is it right?

6/29/2009 11:35:32 AM

dweedle
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yeah, your sex chromosomes mutate during your life so whenever you pass one of them along, it won't be an exact copy of what it was when you received it

6/29/2009 11:38:15 AM

nothing22
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i like where this thread is going

6/29/2009 11:38:36 AM

grimx
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ummm, wat?

6/29/2009 11:38:37 AM

MrNiceGuy7
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^4, but i would think my dad's Y is my grandfather's Y and my dad's X is only his mother's X. Only the dad has a Y to give and the mother an X. It would seem that i would have to have hereditary traits from all people involved but just thinking on levels of X and Y and DNA testing I am not sure how.

6/29/2009 11:42:12 AM

thumper
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Meh, I was a math major. I took Biology one semester and that was it.

Lemme know when you find out though, you've got me thinking!

6/29/2009 11:45:17 AM

darkone
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Quote :
"As a male my X chromosome comes from my mom and Y from my dad. This same Y chromosome comes from his dad and so on. Does this mean that I essentially have none of the genes or hereditary lineage of the women in his line?"


You do know that there are more than X and Y chromosomes, right?

6/29/2009 11:46:04 AM

dweedle
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the only point in time you have your dad's Y chromosome is at conception, as soon as the fertilized egg starts mitosis, it is then YOUR Y chromosome... although it may retain many of the same genes, many of your father's genes are not in play anymore

6/29/2009 12:05:50 PM

bottombaby
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As a man, you have 22 other chromosomal pairs then an X and a Y. The other 22 chromosomes that came from your father could have come from your father's mother or any other females on your father's side.

The Y chromosome can be used to trace male lineage and has been used in population studies, but don't forget that you have more than just the X and Y chromosomes.

6/29/2009 12:14:39 PM

MrNiceGuy7
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Thanks. I knew there were 46 pair I just didn't know what information they contained and from where.

6/29/2009 12:20:34 PM

GREEN JAY
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there are very few y-linked traits. in most everyday cellular function, the y chromosome merely acts as a placeholder for an x chromosome. in a womans body, one of the X chromosomes is randomly deactivated in each cell so there wont be an excess of X-chromosome gene products. so roughly half the cells in her body are expressing one x chromosome, and half are expressing the other. your extra X chromosome has already been deactivated due to incompleteness, so all of your cells are expressing the same X chromosome- the only one you has.


X and Y chromosomes do not undergo recombination in meiosis, only X and X. so your Y chromosome is the one your dad has, while your X chromosome is a mix of the two your mom has.

6/29/2009 1:32:31 PM

GREEN JAY
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they promised me this wouldn't happen anymore

[Edited on June 29, 2009 at 1:33 PM. Reason : ]

6/29/2009 1:32:31 PM

SaabTurbo
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DOUBLE POSTIN SON.


LOOKS LIKE THEY PROMISED WRONG SON.

6/29/2009 1:33:09 PM

GREEN JAY
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time to recombine their faces

6/29/2009 1:35:01 PM

Spontaneous
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The Y-Chromosome is also trash DNA.

My feminist and aggressive female friends were more than happy to tell me this on a weekly basis.

6/29/2009 1:36:26 PM

SaabTurbo
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^ Nice son.

6/29/2009 1:39:06 PM

bottombaby
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The Y Chromosome basically says "grow testes" and that's it.

6/29/2009 1:40:35 PM

Spontaneous
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^^ Do you talk like that in real life? 1,000,000 points to you if you do.

^ hahahaha

[Edited on June 29, 2009 at 1:41 PM. Reason : .]

6/29/2009 1:41:01 PM

SaabTurbo
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Naw, I don't speak like that in real life son.

6/29/2009 1:42:46 PM

Spontaneous
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Oh well. I admit, I do miss the all caps.

6/29/2009 1:46:53 PM

SaabTurbo
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It happens son.

It happens.

6/29/2009 1:47:19 PM

GREEN JAY
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via pm:

Quote :
"so i have no gene expression of the mother of my father? or are their genes potentially expressed on one of the other 44 chromosomes?
"


so aside from your x chromosome from your mom and your y chromosome from your dad, you have 22 chromosomes from your dad and 22 from your mom. Lets go back and look at the spermatagonial progenitor stem cells that became the sperm that made you. it only contained half of each chromosome in your dads body. in other words, chromosomes are not X shaped until they double themselves to divide- you could think of them normally looking like this >. in meiosis 1, this cell duplicated all its chromosomes and lined them up on the central axis of the cell. the 23 chromosomes your dad got from your grandmother and the 23 he got from your grandfather paired off and exchanged genes in a process called recombination in the step in this graph called metaphase 1. you can see that the blue chromosome (representing the 22 non-sex chromosomes) has a little bit of red, and the red one has a little bit of blue now.



so this cell with 4 complete copies of DNA (not your fathers at this point, since the recombination each copy has unique data) splits into 2 cells. each of these cells is fundamentally different from the rest of your fathers cells. each cell only has 23 chromosomes now, and 2 copies of each. furthermore, these 23 do not represent a full set from your grandfather or grandmother. each one contains mostly genetic information from either your grandmother or your grandfather, with some small amount of dna from the other one. so roughly half and half. the picture is wrong here, in the drawing labled telophase1 prophase 2, one cells should have one red chromosome and one cell should have one blue chromosome to represent a mixture of maternal and paternal chromosomes. one of these 2 cells is destined to make 2 female sperm, and one is destined to make 2 male sperm. the male cell splits in half again in anaphase 2, and makes 2 cells which contain only 1 copy of 23 chromosomes, each a thorough mix of paternal and maternal genes (relative to your father), except for the sex chromosome. each of these 2 male sperm cells has one half of a Y chromosome, which comes straight from your grandfather.


in the egg cell that became you, the same thing happens except her X chromosomes do recombine, and instead of making 4 eggs, only one real egg is produced. so your X chromosome is a mix of your maternal grandfather and your maternal grandmother's X chromosome, and all the rest of YOUR maternal chromosomes are too. so you have ample genes represented from each grandparent.



[Edited on June 29, 2009 at 2:10 PM. Reason : ]

6/29/2009 2:07:47 PM

SaabTurbo
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Look son, I know you like, might have studied this and shyte....

































































BUT NAW SON.

NAW.

6/29/2009 2:08:43 PM

GREEN JAY
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LOOK SAABTURBO HERE IT IS HAPPENING IN A WEED SEED




ACTUALLY IN A LILIUM SEED BUT THE SAME THING HAPPENS IN WEED OK

6/29/2009 2:12:03 PM

SaabTurbo
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NAAAAAAAAAAAAAAAAAAAAAAAAAWWWWWWWWWWWWWWWWWWWWWW!!!!!!!!!!!

6/29/2009 2:12:47 PM

GREEN JAY
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look here it is happening in a crack rock




this thread is relevant to your interests!

6/29/2009 2:14:44 PM

SaabTurbo
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Oh god son, that is some good crack!

6/29/2009 2:15:12 PM

nacstate
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the airplane takes off.

6/29/2009 2:18:27 PM

SaabTurbo
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For sure, because the wheels are freely spinning my son.

6/29/2009 2:20:13 PM

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