Lowe disease is caused by a mutation on which chromosome?
AThe X chromosome
BThe Y chromosome
CA mitochondrial one
DThe first chromosome
Answer & Solution
Correct answer: A. The X chromosome
1. Lowe disease is a genetic disease caused by a mutation on the X chromosome.
2. Females possess two X chromosomes and males possess one X and one Y.
3. In females the genes on only one of the two X chromosomes are expressed, so a carrier has a 50 to 50 chance of having the disease.
4. Males have only one X chromosome and its genes are always expressed, so a male whose X carries the gene always has the disease.
5. The mutation lies on the X chromosome.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.4 The Endomembrane System and Proteins_
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