Question

Social competence was measured in girls with Turner's Syndrome, a defect in which the individual is missing an X chromosome. Those who received the single X from their fathers did better and were better adjusted than those who received the single X from their mothers. The dad's gene seemed to override the mother's chemically altered gene. This is an example of:

1) Incomplete dominance
2) Codominance
3) Sex-linked inheritance
4) Genomic imprinting

Answer 1

The better adjustment in girls with Turner's Syndrome who received their X chromosome from their fathers is an example of genomic imprinting, where genes may be silenced based on parent of origin.

Step-by-step explanation:

Your question is about the observation that social competence was measured in girls with Turner's Syndrome, a condition where the individual has only one X chromosome. The findings that girls with Turner's Syndrome who received their single X chromosome from their fathers had better adjustment compared to those who received it from their mothers hint at a phenomenon known as genomic imprinting. This process involves the silencing of certain genes depending on whether they are inherited from the mother or the father. It is not an example of incomplete dominance, codominance, or sex-linked inheritance, which involve different genetic mechanisms.