Q. No. 14. All of the following disorders occur due to defect in DNA repair mechanism EXCEPT: Option A Blooms syndrome Option B Cockayne syndrome Option C Down syndrome Option D Werner syndrome
Answers
Answer: C
Explanation Down syndrome is not associated with defect in DNA repair mechanism
Answer:
The correct answer to this question is (C) Down Syndrome.
Explanation:
Blooms syndrome: Short stature, a sunburned skin rash, and a significantly increased risk of cancer are all symptoms of Bloom syndrome, an inherited condition. From birth, Bloom syndrome patients typically weigh less than 97% of the general population, and they rarely reach adult heights of more than 5 feet.
Cockayne syndrome: Microcephaly, an abnormally small head size, failure to gain weight and grow at the expected rate (failure to thrive), which results in very short stature, and delayed development are all symptoms of Cockayne syndrome, a rare condition. Typically, the signs and symptoms of this condition appear in infancy and get worse over time. The majority of affected people have increased photosensitivity, or sensitivity to sunlight, and even brief exposure to the sun can sometimes result in skin blistering or sunburn.
Werner syndrome: Werner syndrome is characterized by the sudden and dramatic appearance of normal aging characteristics. Until they reach puberty, people with this disorder typically grow and develop normally. Teens who are affected rarely experience a growth spurt, resulting in short stature.
Down syndrome: An extra chromosome is a condition known as Down syndrome. In the body, chromosomes are tiny "packages" of genes. Throughout pregnancy and after birth, they are responsible for determining how a baby's body develops and functions. A baby typically has 46 chromosomes when it is born. One of these chromosomes, chromosome 21, contains an additional copy in Down syndrome infants.
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