Multiple Choice
A child who inherits an X chromosome from the mother and an X chromosome from the father will be:
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3. Extensions to Mendelian Inheritance
Sex Chromosome
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Sasha's 23rd chromosome pair contains two X chromosomes. This indicates that Sasha:
A
is genetically female
B
has Turner syndrome
C
has Klinefelter syndrome
D
is genetically male
Verified step by step guidance1
Understand that human sex chromosomes determine genetic sex: typically, females have two X chromosomes (XX) and males have one X and one Y chromosome (XY).
Recognize that Sasha's 23rd chromosome pair consists of two X chromosomes, which matches the typical female chromosomal pattern (XX).
Recall that Turner syndrome occurs when there is only one X chromosome (XO), not two X chromosomes.
Know that Klinefelter syndrome occurs when there is an extra X chromosome in males (XXY), which is not the case here.
Conclude that having two X chromosomes in the 23rd pair indicates Sasha is genetically female.
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