Paleness (pallor in Latin) is abnormal loss of color from normal skin or mucous membranes due to reduced amount of the blood in the skin arteries. Paleness should be distinguished from other causes of prominent white skin: Fair skin is genetically determined skin hue with low concentration of skin pigment (melanin) in the skin.
autosomal-dominant inheritance, a pattern of inheritance in which the transmission of a dominant allele on an autosome causes a trait to be expressed. Males and females are usually affected with equal frequency. pattern of inheritance in which the transmission of a dominant allele on an autosome causes a trait to be expressed. Males and females are usually affected with equal frequency.
The first allele is dominant and the second allele is recessive. For genes on an autosome (any chromosome other than a sex chromosome), the alleles and their associated traits are autosomal dominant or autosomal recessive. Dominance is a key concept in Mendelian inheritance and classical genetics.ominance is also unrelated to the distribution of alleles in the population. Some dominant alleles are extremely common, while others are extremely rare. The most common allele in a population may be recessive when combined with some rare variants.