Muscular Dystrophy Is a Group of Inherited Disorders That Lead

question 21

Multiple Choice

Muscular dystrophy is a group of inherited disorders that lead to increasing muscle cell loss and thus muscle weakness over time. There are many different types of muscular dystrophy. Symptoms can vary, although all involve muscle weakness. Duchenne muscular dystrophy (DMD) is a recessive X-linked form that leads to muscle degeneration and death usually by age 25. Symptoms begin before age 5 and include low endurance and difficulties standing. As the condition progresses, muscle tissue is replaced with adipose and other types of connective tissue. Abnormal bone development and some neurobehavioral and learning disabilities may also occur. DMD occurs as a result of a mutation in a single gene on the X chromosome. This gene codes for a particular protein, dystrophin, which plays a major role in the structure of muscle cells. The protein formed by the mutated gene is nonfunctional, and the absence of a functional protein eventually leads to cell death. A young boy has DMD. What do you know about his parents?

• A) Both of his parents are carriers of DMD.
• B) At least one of his parents is a carrier of DMD.
• C) His mother is a carrier of DMD.
• D) His father is a carrier of DMD.

---

Definitions:

Demand Estimation

The process of determining the expected demand for a product or service, based on historical data, market trends, and other influencing factors.

Chase Strategy

A demand-matching approach in capacity planning, where output rates are adjusted to match demand forecasts, minimizing inventory levels.

Aggregate Planning

A management strategy aimed at balancing production, inventory levels, and workforce to meet forecasted demand over a medium-term horizon.

Demand Estimation

The process of determining the expected demand for a product or service, based on historical data, market trends, and statistical models.