Sam's Family: Sickle Cell Anemia

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Traits get passed down from one generation to the next through Meiosis (cell division), where each parent gives you one Gene for each trait. One piece of evidence I have to prove my claim is Sam’s family. Sam is a boy who has sickle-cell anemia (A disorder that causes your cells to be disfigured). Both of his parents did not have sickle-cell anemia, but his grandmother on his father’s side does, as well as his grandfather on his mother’s side. All of Sam’s siblings do not have sickle-cell anemia either. This piece of evidence proves my point that each offspring receives one allele from each parent. Sam’s parents both received a sickle-cell and non-sickle cell gene from their parents, so they each have one of each gene. Then they each passed their sickle-cell genes to Sam, so that is why he has sickle-cell disease. This shows that Sam go two genes from his parents, and that getting a trait is not automatic. Another piece of evidence that proves my claim is a fast plant experiment we did. We did three different pedigrees (the generations of an organism) for this experiment. First we did a pedigree with all non-purple stem fast plants. Then we did a second pedigree with only purple stem fast plants. Then our third…show more content…
If one parent gives their offspring a purple stem allele while the other parent gives the offspring a non-purple cell allele, their offsprings stem will be purple. If there is two parents who both give their offspring non-purple stem alleles, their offspring will have a non-purple stem. This proves my point completely, because it shows all of the outcomes for an offspring. It also shows if you get two purple genes from your parents, you can only show a purple stem, same for the non-purple gene. And if you get one of each gene from your parents, then you’ll get a purple because purple is a dominant
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