Answer:
They carry traits that manifest only in one gender.
Explanation:
Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.
Heredity refers to the transfer of traits (specific characteristics) from the parent of a living organism to her offspring through sexual reproduction or asexual production. Some examples of hereditary traits are dimples, tongue rolling, baldness, handedness, freckles, curly hair, color blindness, height, etc.
Sexual reproduction involves the combination of the genome (gamete) of a male and female living organism during fertilization.
The following are associated with sexual reproduction;
a. Fertilization: this is a reproductive process in which the male spermatozoa fertilizes the eggs of the female counterpart and thus leading to pregnancy in humans and animals.
b. Egg and sperm: this is the gamete or reproductive cell found in female and male living organisms respectively. They're usually made up of half of a complete chromosome set.
c. Chromosomes from parents: they are found in the cell nucleus and are comprised of deoxyribonucleic acid (DNA), histone proteins, etc. Thus, they are used to store genetic informations in living organisms.
The human somatic cell is made up of 46 chromosomes which are sub-divided into 22 pairs of autosomes and a pair of sex chromosomes (X and Y). An autosome is one of the numbered chromosome that is typically not a sex chromosome.
On the other hand, sex chromosomes (X and Y) are responsible for determining the gender or sex of living organisms such as humans.
Generally, sex-linked chromosomes are chromosomes which carry traits that manifest only in one gender.
