Which one of the following symbols represents mating between relatives in human pedigree analysis?

Four pedigree symbol options (1)-(4) for mating between relatives

1. [pedigree symbol: filled square, filled circle, filled diamond]

2. [pedigree symbol: square joined to circle by single line]

3. [pedigree symbol: square joined to circle by double line]

4. [pedigree symbol: square joined to circle with vertical line down to filled square]

Doubtly Asked 30 Oct 2026 NEET UG 2023 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 3. [pedigree symbol: square joined to circle by double line]

Key idea: In a human pedigree, a double horizontal line between the male and female shows consanguineous (relatives) mating.

Option 1: filled symbols (square, circle, diamond) show affected male, affected female and affected person of unspecified sex.
Option 2: a single line is an ordinary mating.
Option 3: a double line shows mating between relatives.
Option 4: a normal couple with an affected son; a single line means ordinary mating.

Option 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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