color blindness
Updated: 2/19/2021
color blindness

Storyboard Text

  • Color blindness is a recessive trait that is present in females only when the trait is inherited from both parents. In men, it is present when heterozygous therefore males are more frequently affected by the genetically inherited condition.
  • Color blindness is a recessive trait that is present in females only when the trait is inherited from both parents. In men, it is present when heterozygous therefore males are more frequently affected by the genetically inherited condition.
  • There is genetic testing that can determine if one is color blind. The form of testing used is the Ishihara Color Vision Test which presents pictures made of colored dots and expects one to determine the shape or number hidden inside the picture. The test includes presence versus absence, type, and severity of the disorder.
  • Males are typically XY, meaning that they would have to obtain their X chromosome from their mother. They can never be heterozygous as the color blindness is sex-linked. So, the X chromosome determines whether you'll get the disorder or not.For the carrier: A female with a mutation in one copy of a gene on the X chromosome is said to be a “carrier” for an X-linked condition. A male with a mutation in a gene on the X chromosome is typically affected with the condition.
  • X-linked red-color blindness is a recessive trait. Females heterozygous for this trait have normal vision. The color perception defect manifests itself in females only when it is inherited from both parents. ... Both X-chromosomes must carry the mutant allele for the females to be color blind.