Sex-linked traits are those whose genes are located on the sex chromosomes (X or Y). Because males have only one X chromosome, they are more likely to express recessive sex-linked traits. Females, with two X chromosomes, can be carriers of these traits without expressing them. Understanding the inheritance patterns of these traits is crucial in genetics.
This worksheet helps you practice key concepts related to sex-linked traits. Good luck!
Match the terms with their definitions:
| Term | Definition |
|---|---|
| 1. Sex-linked trait | A. A person who has one recessive allele for a trait, but does not show the trait. |
| 2. X chromosome | B. A trait associated with a gene that is carried only by the male or female parent. |
| 3. Y chromosome | C. The sex chromosome found in both males and females. Females have two copies (XX), while males have one copy (XY). |
| 4. Carrier | D. The sex chromosome found only in males. |
| 5. Hemizygous | E. Having only one copy of a gene (e.g., males for X-linked genes). |
Complete the following paragraph using the words provided: X-linked, recessive, males, females, carriers.
__________ traits located on the X chromosome are more commonly expressed in __________ because they have only one X chromosome. __________ can be __________ if they have one copy of the __________ allele but do not express the trait.
Explain why sex-linked traits are more commonly observed in males than in females. Use specific examples to support your answer.
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