In humans, oculocutaneous (OCA) albinism is a collection of autosomal recessive disorders characterized by an absence of the pigment melanin in skin, hair, and eyes. That is, normal pigmentation ( A ) is dominant over albino characteristics.
For this question, assume the phenotype is determined by a single gene with two alleles. If two people have normal pigmentation, what possible phenotypes may be observed in their offspring?

The offspring may have: normal pigmentation or may have albinism.

Explanation:

In case 1:

AA  x  AA

will produce all offsprings with  genotype AA; normal pigmentation.

In case 2:

AA  x  Aa

has 50% chance of producing offsprings with genotype Aa and 50% chance of producing offsprings with genotype AA. Phenotype of offsprings in both cases will be normal.

In case 3,

Aa x Aa

has 25% chance of producing offsprings with genotype AA, 50 % chance of producing offsprings with genotype Aa and 25% chance of producing aa genotype.

Offspring with genotype AA or Aa will have normal pigmentation and offsprings with genotype aa will be albino.

the dna of humans and mice is almost 92% similar. this similarity indicates that . mice have a tail, while humans have a tailbone. the tailbone is a structure in humans.yes it's true.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.