Question

A hereditary disease which is seldom passed from father to son is
A. Autosomal linked disease
B. X-chromosome linked disease
C. Y-chromosome linked disease
D. None of the above

Answer 1

Humans have 23 pairs of chromosomes in every cell of the body, where 22 pairs are of autosomes, and one pair of chromosomes are allosomes or sex chromosomes and based On the type of allosomes in a person their sex is determined.

Complete answer: Sex chromosomes carry genes that determine the male and female, and they also carry the genes for many traits.
Gene has two pairs of alleles present on the locus of the chromosomes, and they are of two types such as dominant and recessive, if the genes having alleles that are capable of producing the phenotypic expression are called dominant, if not they are called recessive.
If the chromosomes have genes with two alleles, where both are either dominant or recessive are called homozygous, if they have one dominant allele, and one recessive allele, then this is called as heterozygous.
Transfer of genes from parents to mothers is called inheritance, and it is called a genetic linkage
The transfer of genes that are present on sex chromosomes is called sex-linked inheritance.
As we know in humans sex chromosomes are represented by X and Y, where males have XX and females have XY.
Females offspring receive one X chromosome from mother and one from father, and males receive an X chromosome from mother and Y chromosome from father, so the diseases that are passed from father to son are Y linked diseases.
So the correct option is C.

Note: The diseases or disorders which are obtained by transferring genes from parents to offsprings are called genetic diseases, and there are sex-linked diseases where children obtain from parents, where Y linked genetic disease are obtained only by males, as Y chromosome is transferred from father to son.