Question

Given how sex-linked conditions involve genes that are carried on the X chromosome, which statement is true regarding sex-linked recessive condition inheritance pattern of males?

Group of answer choices

possession of a single X chromosome lessens the likelihood that a male will express a defective copy of the genes that cause this set of genetic disorders

possession of a single X chromosome increases the likelihood that a male will express a defective copy of the genes that cause this set of genetic disorders

genes found on the Y chromosome can protect males from defective genes found on the X chromosome and decreases male likelihood of expressing this set of genetic disorders

males and females always have an equal likelihood of showing this set of genetic disorders

Answer 1

possession of a single X chromosome increases the likelihood that a male will express a defective copy of the genes that cause this set of genetic disorders

Step-by-step explanation:

In humans, there are two types of sex chromosomes: X and Y. After fertilization, females receive two X chromosomes, while males receive one X and one Y chromosome. Sex-linked inheritance refers to phenotypic traits associated with genes located on a sex chromosome (either the X chromosome in both males and females or the Y chromosome exclusively in males). Sex-linked disorders/diseases are generally associated with mutations on the X chromosome (because the X chromosome is larger and contains more genes than the Y chromosome), and usually affect males because they contain only one copy of this chromosome. In these cases, females that have a single mutation on one X chromosome often have a normal phenotype due to the presence of the normal allele expressed from the other X chromosome.