Genotypes are described as heterozygous if the two alleles of a gene differ. Alleles contribute to the organism's phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive. When an organism is heterozygous at a specific locus and carries one dominant and one recessive allele, the organism will express the dominant phenotype.
Prenatal Choline Improves Cognitive Attention in Young School Children
Superior Sustained Attention in Children of Mothers Taking 2X the Recommended AI for Choline