Sex-Linked Pedigrees Worksheet
Explore the inheritance patterns of sex-linked traits through pedigree analysis in this Grade 11 Biology worksheet.
Includes
Standards
Topics
Sex-Linked Pedigrees Worksheet
Name:
Date:
Score:
Carefully read each question and analyze the provided pedigree charts to determine the inheritance patterns of sex-linked traits. Answer all questions thoroughly.
1. Traits that are determined by genes located on the X or Y chromosomes are called traits.
2. In X-linked recessive inheritance, affected males do not pass the trait to their sons, but all their daughters will be .
3. A female who is heterozygous for an X-linked recessive trait is called a .
4. Which of the following statements is true about X-linked dominant inheritance?
Affected fathers pass the trait to all their sons.
Affected mothers pass the trait to all their daughters.
Affected fathers pass the trait to all their daughters.
The trait is more common in females than in males.
5. A pedigree chart shows that a trait is present in all males in a family, but never in females. This pattern is characteristic of:
Autosomal dominant inheritance
Autosomal recessive inheritance
X-linked recessive inheritance
Y-linked inheritance
Use the pedigree chart below to answer the following questions.
6. Based on the pedigree chart, is the trait most likely autosomal or sex-linked? Explain your reasoning.
7. If the trait is sex-linked, is it dominant or recessive? Justify your answer.
8. In X-linked recessive inheritance, affected mothers can pass the trait to both their sons and daughters.
True
False
9. Males are more frequently affected by X-linked recessive disorders than females.
True
False
10. Describe the key differences in inheritance patterns between X-linked recessive and X-linked dominant traits. Provide an example of each.