Dizygotic Twins (non-identical) : Indicated by two diagonal vertical lines originating from the same point. Monozygotic twins (identical): Indicated by two diagonal vertical lines originating from the same point. No children: A vertical line with 2 hash marks at the end.
What does a dashed line in a pedigree mean?
A dashed offspring line indicates the individual was adopted into the family, and a solid line indicates the individual was adopted out of the family.
What are the 4 modes of inheritance?
Several basic modes of inheritance exist for single-gene disorders: autosomal dominant, autosomal recessive, X-linked dominant, and X-linked recessive. However, not all genetic conditions will follow these patterns, and other rare forms of inheritance such as mitochondrial inheritance exist.
What does shaded represent on a pedigree?
A completely shaded circle or square indicates that a person expresses the trait. A circle or square that is not shaded indicates that a person neither expresses the trait nor is a carrier of the trait. A black X. represents. death of the individual.
What does P mean on a pedigree chart?
P. Comments. Assign gender by phenotype.
Are circles male or female?
The use of shapes as gender symbols may have originated from kinship diagrams in anthropology, where a circle represents a female and a triangle represents a male.