13. Mendelian Genetics
Non-Mendelian Genetics
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A pleiotropic genetic disorder typically has what characteristics?
A
A single gene is mutated resulting in the change of one phenotypic trait.
B
A single gene is mutated resulting in the change of many phenotypic traits.
C
Many genes are mutated resulting in the change of one phenotypic trait.
D
Many genes are mutated resulting in the change of many phenotypic traits.
Verified step by step guidance1
Understand the concept of pleiotropy: Pleiotropy occurs when one single gene influences multiple phenotypic traits. This is a key concept in genetics where a mutation in a single gene can have multiple effects on an organism's phenotype.
Identify the characteristics of a pleiotropic genetic disorder: In such disorders, a mutation in a single gene leads to changes in multiple phenotypic traits. This is because the gene product (often a protein) is involved in various biological processes.
Analyze the given options: The first option suggests a single gene mutation affecting one trait, which does not align with pleiotropy. The second option correctly describes pleiotropy as a single gene mutation affecting many traits.
Evaluate the remaining options: The third and fourth options involve mutations in many genes, which is not characteristic of pleiotropy. Pleiotropy specifically involves a single gene affecting multiple traits.
Conclude with the correct understanding: A pleiotropic genetic disorder is characterized by a single gene mutation that results in changes to multiple phenotypic traits, as described in the second option.
