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Genes on the X chromosome can be recessive or dominant, and their expression in females and males is not the same because the genes on the Y chromosome do not exactly pair up with the genes on the X. "X-linked" means that the gene causing the trait or the disorder is located on the X chromosome. The first 22 pairs are shared in common between males and females, while the last pair determine gender and are called the sex chromosome pair: females have two X chromosomes, while males have one X and one Y chromosome.ĭuchenne muscular dystrophy is caused by an X-linked recessive gene. There are normally 46 chromosomes in each cell of our body, or 23 pairs. Genes are contained in the cells of our bodies on stick-like structures called chromosomes. Our genes determine our traits, such as eye color and blood type. What causes muscular dystrophy?ĭuchenne muscular dystrophy is a genetic disease which means it is inherited. Girls are rarely affected by either of these two forms of muscular dystrophy. The two forms are very similar, but Becker muscular dystrophy is less severe than DMD. The most common forms of muscular dystrophy are Duchenne muscular dystrophy (DMD) and Becker muscular dystrophy. A lateral, or sideways, curvature and rotation of the back bones (vertebrae), giving the appearance that the person is leaning to one side. Other health problems commonly associated with muscular dystrophy include the following: The muscles break down and are replaced with fatty deposits over time. Muscular dystrophy causes the muscles in the body to become very weak. Whatever it is that started it, there is nothing Haverhill can do to stop it.Muscular dystrophy (MD) is a broad term that describes a genetic (inherited) disorder of the muscles. It may have been 10 seconds later when Jamila steals the ball, pushing it down court in a three-on-one break, makes a no-look pass to Jen who just as quickly fires the ball across the lane to Kathleen for an uncontested layup. It's not certain what triggers it, perhaps it's Jamila's gentle three-pointer from the wing, or more likely, when Jen drives the baseline and as she swoops beneath the basket like a bird of prey she releases the ball back over her head, placing it like an egg against the backboard and through the hoop. It's a kind of controlled frenzy that can overtake a group of athletes under only the most elusive of circumstances. The Hurricanes enter into a zone where all of them are all-Americas.
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Within a few seconds, the score is 6-4 Amherst, and something truly remarkable takes place. Usually there is a buzz of cheering at the start of a game, but this time the Amherst crowd is nearly silent as the referee tosses the ball. They are Cloudy and Cougar and Jonesbones and Gumby and Grace and Skippy and Predator. But as far as the girls are concerned, they (itals)are the codes that encapsulate their rare and superb skills, their specialty plays, their personal styles. To the world, these teen-agers have pretty names: Patri, Kristin, Jen, Kathleen, Kim, Jamila, Sophie, Jade, Emily J., Emily S., Jan, Lucia, Carrie, Rita, Jessi, Julie. To the world, they are a bunch of teen-age girls inside their heads, they are commandos. When the bus finally pulls in front of the Centrum and it is time to leap off, the girls have faces like masks.