Campbell Biology: Concepts & Connections (9th Edition)

Published by Pearson
ISBN 10: 0-13429-601-X
ISBN 13: 978-0-13429-601-2

Chapter 9 - Review - Page 183: 3



Work Step by Step

If Edward is heterozygous for the sickle cell trait, then his genotype is Ss. This means that each parent gave a different allele, or form of the gene, to Edward. Because Edward inherited one chromosome from the homologous pair that carries this trait from each parent, he received one dominant allele (S) on one of the homologous chromosomes and one recessive allele (s) from the other.
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