How can the two chromosomes that make up a homologous pair differ? they can contain different alleles for the same trait. they can contain genes that code for different traits. they can contain the same genes in different orders. they cannot differ in any way when homologous.

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.