Sex-Linked Traits Worksheet
Explore the principles of sex-linked inheritance, including X-linked and Y-linked traits, and analyze Punnett squares for genetic crosses.
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Sex-Linked Traits Worksheet
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Read each question carefully and provide thorough answers based on your understanding of sex-linked inheritance. Show all your work for Punnett square problems.
1. Which chromosome primarily carries genes for sex-linked traits?
Autosomal chromosomes
Y chromosome
X chromosome
Mitochondrial DNA
2. Why are males more likely to express X-linked recessive traits than females?
They have two X chromosomes.
They have a Y chromosome.
They only have one X chromosome.
They have more autosomal genes.
3. A female who carries one copy of a recessive X-linked allele but does not express the trait is called a .
4. Traits that are passed down on the Y chromosome are known as traits.
5. Hemophilia is an X-linked recessive disorder. A carrier female (XHXh) and a normal male (XHY) have children. What is the probability that they will have a son with hemophilia? Show your Punnett square.
6. All sex-linked traits are X-linked.
True
False
7. For an X-linked recessive trait, a father cannot pass the trait to his son.
True
False
8. Red-green color blindness is an X-linked recessive trait. A colorblind man marries a woman who is a carrier for color blindness. What are the possible genotypes and phenotypes of their children? What percentage of their daughters would be colorblind? Show your Punnett square.
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