Why does sex-linked traits show up more often in males than females?

Answer and Explanation:

The X chromosome contains many genes in addition to those that determine sex. The traits determined by these genes are inherited together with those determining sex and are said to be sex-linked.

Most of the sex-linked characteristics are carried by the X chromosome. It therefore follows that a recessive sex-linked gene carried by the X chromosome will always express itself phenotypically in the male because males have only one X chromosome.

in a word, a scientific question is testable. a testable question is one that asks about objects, organisms or events found in the world around it

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.