Question

The sex of the child is determined by the father. How?

Answer 1

It's a sex-determination framework won’t arrange numerous mammals, including people, a few creepy crawlies (Drosophila), a few snakes, some fish (guppies), and a couple of plants. In this system, the sex of a private is decided by a pair of sex chromosomes.

Complete answer:
Human males have an XY genotype and form two types of sperms carrying either X or Y sex chromosomes. A zygote formed by the fusion of sperm with X and an egg cell results in a female child, whereas the fusion of a Y sperm leads to a male child.

Additional Information: In humans, half of the spermatozoa carry the X chromosome and the other half the Y chromosome. A single gene (SRY) present on the Y chromosome acts as a sign to line the developmental pathway towards maleness. The presence of this gene starts off the process of virilization. This and other factors result in sex differences in humans. The cells in females, with two X chromosomes, undergo X-inactivation, during which one among the 2 X chromosomes is inactivated. The inactivated X chromosome stays inside a cell as a Barr body.
People, likewise as different life forms, can have an uncommon chromosomal plan that is in opposition to their phenotypic sex; for example, XX responsible for male or XY females (see androgen lack care condition). Additionally, an abnormal number of sex chromosomes (aneuploidy) could also be present.

Note: All animals have a set of DNA coding for genes present on chromosomes. In people, most mammals, and a couple of different animal categories, two of the chromosomes, called the X chromosome and Y chromosome, code for sex. In these species, at least one gene is available on their Y chromosome that decides maleness. During this process, an X chromosome and a Y chromosome act to work out the sex of offspring, regularly on account of qualities situated on the Y chromosome that code for maleness.