A pedigree is a genetic representation of a family tree that diagrams the inheritance of a trait or disease though several generations. The pedigree shows the relationships between family members and indicates which individuals express or silently carry the trait in question.
What pattern of inheritance does this pedigree chart represent?
The correct answer is an X-linked recessive trait.
What is a 3 generation pedigree?
The three-generation pedigree provides a pictorial representation of diseases within a family and is the most efficient way to assess hereditary influences on disease. … A three-generation pedigree has been used for diagnostic consideration or risk assessment of rare single-gene or chromosomal disorders.
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 is it called when genes are passed down?
But when people talk about genes being passed on, they generally don’t mean genes being passed on from cell to cell during cell division. Instead, they usually mean genes being passed on from parents to children. This is known as “heredity” or “inherited genes.”