Biological Sex Differences – Understanding Sexual Difference

Sex is a very specific trait that defines an individual’s reproductive role, male or female, both in plants and animals that reproduce through sexual intercourse. The kind of gametes (sex cells) produced by an animal define its sex. In humans, the chromosomes that define sex are located on the sex chromosomes of the X or Y sex chromosomes. The majority of the human somatic cells carry both X and Y chromosomes; however, some are carrying only one or the other.

The word ‘sex’ itself can be misleading because it often refers to something that occurs between the time of conception and birth. This is because the term ‘sex’ is often used interchangeably with the term ‘fertilization’ or ‘conception.’ Although ‘sex’ doesn’t start at conception, it is often used to indicate the point at which sex cells unite and start producing eggs or sperm. In this sense, the term refers to the beginning of the development of life.

Some scientists argue that the meaning of the term has expanded to include all of the differences between men and women, including prenatal development, adult onset sexual disease, and intrauterine insemination infertility. Similarly, a Zimmerman refers to a boy born with a female appearance, or a girl with a male appearance. A more recent explanation for the meaning of the term Zimmerman is that the term was created to distinguish the biological sex difference in appearance between a female baby and a male baby. This is in addition to the sexual differentiation between male and female sperm. This could explain why Zimmerman refers to the boy who is born with a Y chromosome, as opposed to the girl who is born with an X chromosome.

However, there are many biological aspects that are shared between both genders. These differences are referred to as genotype, and they include: autosomal recessive genetic conditions such as Down syndrome; autosomal dominant genetic conditions such as Turner’s Syndrome; Y chromosome genetic differences, such as those found in the male leopard Cattellis and the African Grey Parrot; and mitochondrial genetic differences, such as those found in humans that have mitochondria in their cells. These differences are often used interchangeably with the term Eutherian, even though eutherians are marsupials. In fact, it may be more appropriate to use the term Eutherian when referring to a species like the squirrel monkey, than using the term Zimmerman, as the latter is derived from a German term.

There are other biological sex distinctions that are frequently used interchangeably, including: chromosomal sex (X or Y) and genitalia. Biogenesis refers to the development of a cell from a germ cell. Sex determination is based on genetic differences between the two sexes. Although a person can be born with a certain set of chromosomes, it is possible to receive additional chromosomes through an accident of birth, and these additional chromosomes change the structure and function of the individual’s body and mind, often resulting in the identification of a new, non-sexed identity.

While many differences between the sexes have been explained by science, some remain unexplained, especially in terms of gender identity issues. For example, many individuals do not realize that a penis exists which can be surgically enlarged or reduced. Similarly, there are genetic differences between the colors of eyes or hair and their patterns and coloration. While there are biological differences between physical traits such as height and weight or muscularity and mental attributes such as intelligence or creativity, many individuals have come to consider some attributes to be purely psychological and have sought sex reassignment for these reasons.