RE: Left arm vs. right arm blood pressure question 9/16/2005 5:01AM - in reply to veryyyy. Reply. Return to Index. Report Post. The plumbing from the heart to the left arm is more direct than to the right arm, so in order to get truer numbers, the left arm is preferred.
Pedigrees show how characteristics are passed from one generation to the next. They are used in studying human genetics because it is not possible to carry out controlleâ¦d breeding experiments with humans, as we can with other animals or with plants.
Individuals on a pedigree chart that have unshaded symbols have at least one dominant gene, and show the dominant trait. Rules one must follow to predict genotype: Any person on a pedigree chart that has a shaded symbol must be assigned two (2) recessive genes. Place lower case letters under the person's symbol. Any person on a pedigree chart that has an unshaded symbol must be assigned a dominant gene. Place a capital letter under the person's symbol. To determine the second gene for persons who show a dominant trait a Punnett square must be used.