Question

The allele for colorblindness is located on the X chromosome, so it isNormally, colorblindness is atraitand requires two copies of the allele. Sincehave twoX chromosomes, they do not exhibit any symptoms if they have onlyone colorblindness allele. However. sincehave onlyone X chromosome, they need to inherit the allele only once toexpress the trait.

Answer 1

Colorblindness is an X-linked recessive trait. Males with one colorblindness allele on their X chromosome will be colorblind. Females need to inherit the colorblindness allele on both X chromosomes to express the trait.

Step-by-step explanation:

Colorblindness is an X-linked recessive trait. In males, who have only one X chromosome, the presence of the colorblindness allele on that chromosome will result in colorblindness. In females, who have two X chromosomes, they need to inherit the colorblindness allele on both chromosomes to express the trait. However, females can be carriers of the colorblindness allele if they have one normal allele and one colorblindness allele.

Answer 2

The allele for colorblindness is located on the X chromosome, so it is sex-linked. Normally, colorblindness is a recessive trait, and requires two copies of the allele. Sincefemales_ have two X chromosomes, they do not exhibit any symptoms if they have only one colorblindness allele. However, sincemales_ have only one X chromosome, they need to inherit the allele only once to express the trait.