please help me with this question Short Answer 3. The pedigree shown is of a family with an X-linked recessive disease. The sex chromosomes are indicated. Individual II-2 is the result of a non-disjunction event in one of the parents.12XHXH xhy112IIXhY B) Upon further testing, it is discovered that Individual l-1 has a mild case of the disease. Please give a short explanation as to how that is possible.

The X-linked recessive disorder is a genetic condition in which mutations in genes are present on the X chromosome. A male with this mutation is affected while the females are generally unaffected.The pedigree shows X-linked recessive disorder which means the disease-causing gene is present on X chromosomes. and offspring inherits one X gene from mother and one from father. A a cross between affected male (I-2) and normal female (I-1) produce all the affected offsprings: son (II-1 and II-2). It is because of the nondisjunction of the chromosome where two chromosome fails to separate during meiosis. nondisjunction of chromosome causes segregation of extra X chromosome that carries disease gene (Xh) into male offsprings (XXY). all the males are affected by X-linked disorder since the Y chromosome does not confer any protection against disease. while, in females, the presence of a normal X chromosome will mask the effects of an abnormal gene on another X chromosome, hence female offerings are not affected by X-linked disease. They will produce effects in their offspring.