Atypical Sex Chromosome Patterns

Question 1

Outline Klinefelter’s syndrome

Answer 1

• An example of an atypical chromosome pattern
• A syndrome affecting males in which an individual’s genotype has an extra X chromosome (in addition to the normal XY), characterised by a tall thin physique, small infertile testes, and enlarged breasts

Question 2

Define atypical sex chromosome patterns

Answer 2

Any sex chromosome pattern that deviates from the usual XX/XY formation and which tends to be associated with a distinct pattern of physical and psychological symptoms