by alex
Unlock the mysteries of sex-linked pedigrees and delve into the intricate patterns of inheritance that are passed down through generations. This quiz will challenge your understanding of how traits linked to sex chromosomes are inherited and expressed. Sharpen your genetic analysis skills and see how well you can trace these traits through family histories. Best of luck!
Sex-Linked Pedigrees Quiz Questions Overview
1. What is a sex-linked trait?
A trait that is only found in males
A trait that is only found in females
A trait that is associated with a gene located on a sex chromosome
A trait that is found on an autosome
2. Which chromosome is most commonly associated with sex-linked traits?
X chromosome
Y chromosome
Chromosome 21
Chromosome 18
3. In a pedigree chart, how are males typically represented?
Squares
Circles
Triangles
Diamonds
4. How are carriers of a sex-linked recessive trait typically represented in a pedigree?
Half-shaded circles or squares
Fully shaded circles or squares
Unshaded circles or squares
With a dot in the center of the circle or square
5. Which of the following is an example of a sex-linked recessive disorder?
Hemophilia
Cystic fibrosis
Huntington’s disease
Sickle cell anemia
6. If a mother is a carrier for a sex-linked recessive trait and the father is unaffected, what is the probability that their son will express the trait?
0%
25%
50%
100%
7. Why are sex-linked traits more commonly expressed in males?
Males have two X chromosomes
Males have only one X chromosome
Males have more chromosomes
Males have fewer chromosomes
8. In a pedigree, what does a horizontal line connecting a square and a circle represent?
Siblings
Mating
Twins
Adoption
9. If a father has a sex-linked dominant disorder, what is the probability that his daughters will inherit the disorder?
0%
25%
50%
100%
10. In a pedigree chart, what does a vertical line connecting a circle and a square to a horizontal line below them represent?
Siblings
Offspring
Twins
Marriage
