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.
Heterozygous genotypes are represented by a capital letter (representing the dominant allele) and a lowercase letter (representing the recessive allele), such as Rr or Ss. Alternatively, a heterozygote for gene R is assumed to be Rr. The capital letter is usually written first.n diploid organisms, one allele is inherited from the male parent and one from the female parent. Zygosity is a description of whether those two alleles have identical or different DNA sequences. In some cases the term zygosity is used in the context of a single chromosome.