Sex linked genes is a trait in which a gene is found on a sex chromosome, males are the one that carry most/ more of the mutation.
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Sex linkage applies to genes that are located on the sex chromosomes. These genes are considered sex-linked because their expression and inheritance patterns differ between males and females. While sex linkage is not the same as genetic linkage, sex-linked genes can be genetically linked
The correct answer is (A) They may be on one sex chromosome but not the other.
Sex-linked genes are present on either of sex- chromosomes of the individual. In humans females are homogamatic with two X chromosomes, while the males are heterogametic with one X and Y so we can say that, in human male genes on X or Y chromosome are called sex-linked.
The correct answer is multiple alleles.
There are 2 alleles in a population that finalizes a particular trait. But there can be more than 2 alleles in a population that finalize a particular trait. Individuals in the population may have different forms of the allele for the trait. Therefore, means that they are more than 2 alleles in the population that determine a trait such as blood type in humans. This is called as multiple alleles. The alleles interact with different levels of dominance over other alleles. So, the different phenotypes formed from the interaction of different alleles.
Thus, the correct answer is multiple alleles.
XX or YX
Sex linked genes are genes that are in the sex chromosomes and that are therefore inherited differently between males and females.