How can you explain the inheritance of sex-linked traits?

Answer 1

Sex- linked traits are those where the genes are found on the X and Y chromosomes. Colorblindness and male pattern baldness are the most well-known sex-link traits.

Women have two X chromosomes. Men have one X and one Y, but the Y chromosome has fewer genes than the X. These differences help account for different patterns of inheritance than non-sex-linked traits.

Answer 2

The X chromosome information is expressed than the y chromosome so what ever X chromosome is passed to the male offspring it will be expressed in the male. Rarely it is ever expressed in female offspring because that chromosome with sex-trait is less dominant than the other X-chromosome she has.

Answer 3

Using pedigree analysis, you can determine a trait is sex-linked or not. If a trait is inherited by all sons of a male who has a trait and all daughter don't have the trait including their mother, this trait should be y-linked. To determine an X-liked trait is a little bit tricky, because there are many pattern in inheriting this type of trait.

-Some of the pattern can be considered X-linked recessive :

1) If the mother has the trait but the father doesn't, all of the sons have the trait and the daughter (all) don't have the trait.

2) If the mother is not showing the trait and the father showing the trait. Half of the daughter showing the trait none of the son showing the trait.

3) If the mother and father are not showing the trait but half of the son showing the trait.

-Some of pattern can be considered to X-linked dominant :

1) if the mother is showing the trait and the father is not showing the trait. All of the kids are showing the trait.

2) if the mother is showing the trait and the father is not showing the trait. half of the sons are showing the trait.

3) if the father is showing the trait, the mother is not showing the trait. All of the daughters are showing the trait.

Answer 4

Sex-linked traits are genes located on the sex chromosomes, typically X-linked. Since males have only one X chromosome, they will express any trait present on that chromosome, whether dominant or recessive. Females have two X chromosomes, so the expression of a sex-linked trait depends on whether the gene is dominant or recessive and the presence of the gene on one or both X chromosomes.

Answer 5

A sex linked trait is inherited by the parents passing on the gene/trait through sex

Answer 6

Females have 2 X chromosomes so the X-linked genes follow the same rules of dominance & recessivity as the genes on the autosomes.