Nyzayha Meza

1/8/15

                                                                         Heredity


     Heredity is the study of traits to an offspring from a parent. Heredity is when you receive genes or traits from both mom and dad, they may or may not be visible but are definitely there. You'll get traits like hairline, skin color, eye color and more. The traits can also come from relatives like grandmother and father!

     Gregor Mendel was an Austrian monk that tested his experiments for heredity on pea plants. He would put two pea plants together for weeks or months and a pea plant off spring would  appear with characteristics from both plants. Gregor Mendel was known as ''The Father Of Genetics" because of his experiments on pea plants and uncovered laws or inheritance.

 

An Allele is a alternate form of a trait. An example would be a hairline, there are widows peak and straight hairline.

         A dominant trait is a trait that is visible and covers over weaker traits. An example would be your eye color if your dad has blue eyes and your mom has green and you get have blue than that's the dominant trait!






         A recessive trait is a weaker trait that is covered up by a stronger trait or dominant trait.






         Incomplete dominance is when a trait is not completely covering over a weaker trait and now makes a whole new Phenotype.





          Homozygous is when you have two versions of the same traits like WW. Heterozygous is when you have two different versions of a trait like Ww.

         Reginald Punnett was a British geneticist that created a mathematical tool used to predict the likely trait of a offspring. Punnett co founded the journey of genetics with William Bateson.

         A Pedigree is a tool used to record the history of the families track of diseases. And is used by labeling the marks on the pedigree to explain what they mean. It can  be used to see if your a carrier or affected by a disease that runs in your family.






         Hemophilia is a serious condition when your body is fragile and you bleed for a long periodically time and can even bleed from a small injury. The blood doesn't clot correctly and the affected person bleeds severely. Symptoms are deep bruises, unpredicted bleeding, tightness in joints and nose bleeds without an exact cause.


          Hemophilia is inherited by a recessive pattern in one of the female sex chromosome, when a chromosome makes a copy of the gene in every single cell in your body.




           Hemophilia is a disease in your blood and the patient inherited the disease from the mother. The disease is in the X chromosome that females have when they reproduce. The probability of the off spring being affected by the sickness depends on the sex  of the offspring as seen on the Punnett square above.if the organism is a boy  (XY) it has a 0% chance of having the disease as shown on the image. If it's a female (XX) it has a 100% chance of inheriting the disease.






By: Nyzayha Meza