Multiple Choice
Which of the following individuals will have hemophilia, assuming hemophilia is an X-linked recessive disorder and neither parent has hemophilia in their family history?
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2. Mendel's Laws of Inheritance
Sex-Linked Genes
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Which of the following chromosomes is most likely affected by a sex-linked trait?
A
Chromosome 14
B
X chromosome
C
Chromosome 7
D
Chromosome 21
Verified step by step guidance1
Understand that sex-linked traits are typically associated with genes located on the sex chromosomes, which determine the biological sex of an organism.
Recall that humans have 23 pairs of chromosomes: 22 pairs of autosomes and 1 pair of sex chromosomes (X and Y).
Recognize that chromosomes 14, 7, and 21 are autosomes, meaning they are not involved in determining sex and usually do not carry sex-linked traits.
Identify that the X chromosome is one of the two sex chromosomes and is commonly involved in sex-linked inheritance patterns, especially for traits that show different patterns in males and females.
Conclude that among the options given, the X chromosome is the most likely to be affected by a sex-linked trait because sex-linked traits are generally found on the X or Y chromosomes, not on autosomes.
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