Multiple Choice
In humans, how many chromosomes are inherited from the father?
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3. Extensions to Mendelian Inheritance
Sex Chromosome
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Which of the following is true about an individual with a karyotype showing one X and one Y chromosome?
A
The individual has Turner syndrome.
B
The individual is genetically male.
C
The individual is genetically female.
D
The individual has three sex chromosomes.
Verified step by step guidance1
Step 1: Understand what a karyotype is — it is a visual representation of an individual's chromosomes arranged in pairs, used to identify chromosomal abnormalities and determine genetic sex.
Step 2: Recall that human sex chromosomes determine genetic sex: typically, females have two X chromosomes (XX), and males have one X and one Y chromosome (XY).
Step 3: Analyze the given karyotype showing one X and one Y chromosome, which matches the typical male chromosomal pattern.
Step 4: Recognize that Turner syndrome is characterized by having only one X chromosome (XO), not an X and a Y, so this individual does not have Turner syndrome.
Step 5: Conclude that since the individual has one X and one Y chromosome, they are genetically male, and they do not have three sex chromosomes.
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