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Question
Which one of the following symbols and its representation, used in human pedigree analysis is correct?
Which one of the following symbols and its representation, used in human pedigree analysis is correct?
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Solution
The correct option is D
In a pedigree chart, geometric symbols with connecting lines are used to denote members of a family, their relationship with each other and whether they are carrying the specified trait or not.
The geometric figures are either shaded or not depending upon whether they carry a trait or not.
The image given above represents what each geometrical figure represents in a pedigree chart.
Square box represents a male individual. Circle represents a female. A rhombus represents an individual whose sex has not been specified.
A figure which is unshaded represents an unaffected individual, while that is shaded represents an affected individual.
A single horizontal line between a circle and square represents marriage between two individuals. Two horizontal lines between them represents consanguineous marriage. It represents marriage between closely related relatives.
In option d the symbol and its representation is correct.
In a pedigree chart, geometric symbols with connecting lines are used to denote members of a family, their relationship with each other and whether they are carrying the specified trait or not.
The geometric figures are either shaded or not depending upon whether they carry a trait or not.
The image given above represents what each geometrical figure represents in a pedigree chart.Square box represents a male individual. Circle represents a female. A rhombus represents an individual whose sex has not been specified.
A figure which is unshaded represents an unaffected individual, while that is shaded represents an affected individual.
A single horizontal line between a circle and square represents marriage between two individuals. Two horizontal lines between them represents consanguineous marriage. It represents marriage between closely related relatives.
In option d the symbol and its representation is correct.
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