What is a sex linked trait pedigree?

Sex-linked trait. Trait that is located on one of the two sex chromosomes. Homozygous. Having two identical alleles for a particular gene. Heterozygous.

How do you tell if a trait is sex linked on a pedigree?

Explanation:

  1. In a pedigree displaying autosomal trait, affected individuals are of both sex: that is both male and female individuals could be affected in 1:1 ratio.
  2. In a pedigree displaying sex linked trait, an overwhelming number of males will be affected.

What is an example of a sex linked recessive trait?

Examples of X-linked recessive conditions include red-green color blindness and hemophilia A: Red-green color blindness.

Can sex-linked traits be recessive?

Females can get an X-linked recessive disorder, but this is very rare. An abnormal gene on the X chromosome from each parent would be required, since a female has two X chromosomes.

How do you know if a pedigree is recessive or dominant?

Determine whether the trait is dominant or recessive. If the trait is dominant, one of the parents must have the trait. Dominant traits will not skip a generation. If the trait is recessive, neither parent is required to have the trait since they can be heterozygous.

How do you tell if a pedigree is dominant or recessive?

The disease must be RECESSIVE if any affected individual has 2 unaffected parents. Since this is a genetic disease at least one parent must have an allele for the disease. If neither parent is affected, the trait cannot be dominant.

Are all sex-linked traits recessive?

It also depends on whether the trait is dominant or recessive. Sex-linked diseases are inherited through one of the sex chromosomes, which are the X and Y chromosomes. Dominant inheritance occurs when an abnormal gene from one parent can cause a disease, even though a matching gene from the other parent is normal.

Which statement is true of a sex-linked recessive gene?

Answer and Explanation: d. Sex-linked recessive traits appear more often in males. Men (XY) have only one X chromosome whereas women (XX) have two X chromosomes.