An allele is one of two or more versions of a gene. An individual inherits two alleles for each gene, one from each parent. If the two alleles are the same, the individual is homozygous for that gene. If the alleles are different, the individual is heterozygous.
Prenatal Choline Improves Cognitive Attention in Young School Children
Superior Sustained Attention in Children of Mothers Taking 2X the Recommended AI for Choline