Question

Observe the following pedigree symbol. What does this symbol represent?

• A. The couple has a pair of monozygotic twins
• B. The couple has a pair of dizygotic twins
• C. The couple are cousins or closed relative to each other
• D. The couple had both the offspring suffering from an autosomal recessive disorder

Answer 1

Answer: (A)

In pedigree symbols, if there is a marriage between relatives it is represented by a double line between the couple. According to this symbol, both the children are born at the same time and they are connected. This represents that they are identical twins or monozygotic twins. If there would have been an absence of a horizontal line between children, it would mean that they were non-identical or dizygotic twins.