Constructing a Pedigree: Key Symbols and Techniques

What symbol is used to represent a male in a family tree?

• Circle

• Square

• Diamond

• Triangle

What does a filled circle represent in a family tree?

• A male with an autosomal dominant condition

• A male carrier of a genetic condition

• A female carrier of a genetic condition

• A female with an autosomal recessive condition

How do you indicate that an individual is deceased in a family tree?

• By leaving the symbol empty

• By drawing a line through them

• By marking them with a cross

• By drawing a circle around them

How is a marriage between two individuals indicated in a family tree?

• By a single line

• By a double line

• By a dashed line

• By a solid line connecting the two

How are identical twins represented differently from fraternal twins in a family tree?

• By using a double line for fraternal twins

• By using a circle for fraternal twins

• By using a triangle with a line across it for identical twins

• By drawing a square for identical twins

In a family tree, how are carriers of an autosomal condition marked?

• By leaving the symbol empty

• By using a different color

• By drawing a line through the symbol

• By filling in the symbol halfway

What is the significance of filling in a symbol halfway in a family tree?

• It denotes a carrier of a genetic condition

• It represents an adopted child

• It signifies a marriage

• It indicates the individual is deceased

What does a diamond symbol represent in a family tree?

• An unborn child with unknown gender

• A deceased individual

• An adopted child

• A marriage

What does the Roman numeral II represent in a family tree?

• The second child of the first generation

• The second deceased individual in the tree

• The second generation

• The second marriage in the tree

How are children numbered in a family tree?

• Randomly

• In order of birth from left to right

• In alphabetical order

• In order of age from right to left