PATHOLOGY

PATHOLOGY MCQ

GENETICS AND DISEASE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Most genetic disorders are caused by the expression of ____
A
recessive alleles
B
2 dominant alleles
C
one dominant allele
D
sex-linked heredity
Explanation: 

Detailed explanation-1: -Examples of autosomal recessive disorders include cystic fibrosis, sickle cell anemia, and Tay Sachs disease.

Detailed explanation-2: -Cystic fibrosis is the most common, lethal, inherited disease in white populations. Approximately 1 in 2500 newborns in the United States is born with the disease. It typically displays autosomal recessive inheritance requiring each parent to provide a pathogenic allele to their child for the disease to manifest.

Detailed explanation-3: -Autosomal recessive inheritance is a way a genetic trait or condition can be passed down from parent to child. A genetic condition can occur when the child inherits one copy of a mutated (changed) gene from each parent. The parents of a child with an autosomal recessive condition usually do not have the condition.

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