Which phenomenon is explained by sex-linked inheritance?

Sex-linked inheritance refers to the transmission of traits that are associated with genes located on the sex chromosomes, specifically the X and Y chromosomes in humans. In this context, color blindness is a classic example of a sex-linked trait because the genes that affect the condition are found on the X chromosome.

Since males have one X and one Y chromosome (XY), a recessive allele on the X chromosome will manifest as color blindness if it is inherited because the Y chromosome does not carry a corresponding allele to mask it. Females, on the other hand, have two X chromosomes (XX), and they would need to inherit two copies of the recessive allele (one from each parent) to be color blind. This pattern of inheritance clearly illustrates how sex-linked traits can be influenced by the genetic composition related to the sex of the individual.

Other options, such as blood type, skin pigmentation, and flower color, are determined by autosomal (non-sex) chromosomes and do not follow the same inheritance pattern as those observed in sex-linked traits. Blood type is governed by multiple alleles and does not have a direct relationship with sex chromosomes. Skin pigmentation arises from several genes acting together and is influenced by multiple factors, while flower color in plants can result from various inheritance