Exploring Genetic Causes of Diseases

Homozygotes have normal enzyme function.

Heterozygotes do not produce any defective enzymes.

Homozygotes lack normal enzyme function and develop the disease. (correct)

Heterozygotes have double the amount of normal enzyme compared to homozygotes.

Daughters always receive the X chromosome carrying the mutant allele from their father.

Sons inherit their X chromosome from their father.

Heterozygous females do not pass on the trait to their sons.

Affected males do not pass on their Y chromosome to their sons. (correct)

Primarily affect enzyme proteins

Single nucleotide changes

Changes limited to a single gene

Changes in chromosome number (correct)

<p>Affected males only pass on the mutant allele to their daughters.</p> Signup and view all the answers

<p>The presence of normal enzyme compensates for the defective enzyme.</p> Signup and view all the answers