How are twins show on pedigree?

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.

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Family heirloom