A child who inherits an X chromosome from the mother and an X chromosome from the father will be:

• A. affected by Turner syndrome (XO)
• B. affected by Klinefelter syndrome (XXY)
• C. genetically female (XX)
• D. genetically male (XY)

Answer: (C)

Verified step by step guidance

1. Understand the basics of human sex chromosomes: females typically have two X chromosomes (XX), and males typically have one X and one Y chromosome (XY).
2. Recognize that Turner syndrome (XO) occurs when there is only one X chromosome and no second sex chromosome, which is a different scenario than inheriting one X from each parent.
3. Know that Klinefelter syndrome (XXY) occurs when there is an extra X chromosome in a male, meaning the individual has two X chromosomes and one Y chromosome, which is not the case here.
4. Since the child inherits one X chromosome from the mother and one X chromosome from the father, the child has two X chromosomes (XX).
5. Conclude that having two X chromosomes (XX) means the child is genetically female.