Sunday, July 26, 2009

My genetics.?

ok so you get 22 chromosones from your dad and 22 chromosones from your mom



and your xxy chromosne



now you have your OWN DNA.



ok i get this but if you have 50% from your mom and 50% from your dad how can you look more like your dad then your mom?



Also i look chineese and have chinese type hair and a chineese nose[wide] my chineese ancestor was my great great grandpa, but if you get so little from your grandparents alone then how come i got so much genes from my great great grandparent.



my dad looks nothing chineese and my his mom looks a little chineese.



Im 3rd generation german, 3rd generation chineese, 3rd generation french and 2nd spain.



i have brown/black hair im 4ft 11 and im 13



im light brown{was pale white when i was born}



i just want to know why i got so much genes from my dad side?? enough that people actually think im somewere from asia its either they think im white, asian or spanish is the first things they ask me and its annoying.



My genetics.?

Traits seem to mix and skip generations at times. It's okay, it happens. If you got more genes from your dad, that means his traits were Dominant. Dominant traits are traits that can mask the traits of your other parent. So your dad's dominant traits were masking your mom's traits. In other words, your mom's traits were recessive, and over-run by your dad's dominant traits, so these recessive traits will not appear on you..



by the way, normally, you get either an X or a Y from your dad, and an X from your mom. Not XXY, that's not normal



My genetics.?

Genetics is very complicated. It's not just simple math; in fact, the activities during meosis should account for the differences between you and the rest of family. If you have a sibling, they will look different from you, too.



Meiosis is the formation of sex cells. Each sex cell contains 23 chromosomes. Meiosis is separated into two sections: Meiosis I and Meiosis II. Meiosis I begins with a 46-chromosome cell. One set of chromosomes (23) came from your mother, the remaining 23 came from your father. In the earlier stages of Meiosis I, these pairs line up together and for a tetrad. (Meaning, chromosome 1 from your dad lines up with chromosome 1 from your mom and so on...) A tetrad is the name for the complex when the pairs are connected by their centromeres. In a tetrad, the corresponding chromosome pairs can exchange segments of genes/DNA. It's obvious that your parents are very different from one another, but if you consider the fact that some genes contain more than 2 or 3 variations and certain characteristics are influenced by several genes (skin color is influenced by at least 7 genes, this and certain enviromental factors contribute to the various skin colors), you realize that this is a lot of variety. Keep in mind, that your parents may have one copy of a specific variation, or more and that some genes are dominant (they are expressed no matter what) or recessive (the traits are only expressed when there is no dominant gene present). You can't really tell just by looking.



When the cell divides at the end of Meiosis I, there is no specific assortment of which chromosome goes to which daughter cell. (i.e. Nothing tells the paternal chromosomes to go to one specific cell and the maternal chromosomes to go to another cell.) The end result is a random assortment of the chromosomes. One cell could have all of your dad's chromosomes, or it could not.



Besides the event(s) in Meiosis I, remember that there is also random fertilization. During sex, millions of sperm cells (male sex cells) are released. Only one ovum/egg (female sex cell) is released (sometimes two are released, but that's another story). With millions of sperm cells and one egg cell, there's no definite connection between one specific sperm cell and the egg; whichever sperm cell manages to fertilize the egg is by random chance.



I hope this wasn't too confusing. Otherwise, Google it.



My genetics.?

I believe that this has to do with dominant and recessive traits on the genes more than anything. Its just like brunettes and blondes. Having blonde hair is a recessive trait, since you need both parents to donate the recessive allele, but if you get one brunette and one blonde gene, you will be a brunette. Sometimes it is just a matter of what genes "turn on" first.



My genetics.?

Firstly, just to correct you we have 23 chromosomes from each parent, not 22.



As pointed out its complicated. Traits can be dominant or recessive...this means that if a parent has the trait ( like brown eyes) you have a higher chance of getting it too.



Other traits like hair, skin colour are called polygenes where there are several genes working together and you get a range of colours depending on the mix of genes you get. This means with mixed heritage you can get a spectrum of colours etc and you as the offspring can get anything inbetween.



If your father has lots of dominant characters and dark colouring etc, this means these traits may " overpower" or influence what yuo look like on hte outside more than your mother...however you still have 50% mothers genes and still carry them, they just may not be EXPRESSED in you.



If you have children, you will find that they show a mix of your traits as well as your partners....and they may show some traits but not others.

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