Symptoms of iron-deficiency anemia are related to decreased oxygen delivery to the entire body and may include: 1  Being pale or having yellow sallow skin. 2  Unexplained fatigue or lack of energy. 3  Shortness of breath or chest pain, especially with activity. 4  Unexplained generalized weakness. 5  Rapid heartbeat.
Average heterozygosity refers to the average percentage of loci that are heterozygous in a population. Average heterozygosity is measured by looking at changes in karyotypes. The human genome consists of approximately 3 billion base pairs.
So if there is an average heterozygosity of 0.25 for example, you could theoretically have quite diverse heterozygosities from locus to locus. As such, you should not impute too much about the allele frequency of a given locus from an average heterozygosity that is taken from across many loci.