Question

Which allele combination represents a male who has an X-linked recessive disorder?

Answer 1

XrY is the allele combination which represents a male who has an X-linked recessive disorder.

Hemophilia is a x-linked recessive disorder that carries on from one generation to another.

Duchenne muscular dystrophy is also a x-linked recessive disorder which carries on from one generation to another.

The science of genetics is used to guess the chances of an offspring inheriting certain physical, mental traits or diseases.

Answer 2

Recessive means that two non - working copies of the gene are necessary to have the trait or disorder.

The recessive trait is represented by :

r

The male sex chromosomes are given as XY.

Since the disorder is linked to the X chromosome, the allele will be written as :

XrY