What is it?
Every child is born with a special and different profile of heredity that supports his or her life, as well as her growth, human traits and individuality. Each child has several genes, which is the basic unit of heredity. Each gene is made up of DNA. DNA is known as the Deoxyribonucleic Acid and can also be referred to as a ladder or a spiral all tangled up.
Each Strand of DNA consists of a Nucleus, chromosomes, and a gene.
Nucleus is known as the control center of the cell and contains the chromosomes and the gene.
Chromosomes are threadlike structures composed of DNA molecules.
Gene is a part of DNA (Spiraled double chain) containing the hereditary code.
25,000 or so genes that exist in the human body are laid out in special way that created a rodlike structure.
46 chromosomes reside in the center of virtually every cell in the body. Each child received 23 chromosomes from the father and 23 chromosomes from the mother.
Every child is born with a special and different profile of heredity that supports his or her life, as well as her growth, human traits and individuality. Each child has several genes, which is the basic unit of heredity. Each gene is made up of DNA. DNA is known as the Deoxyribonucleic Acid and can also be referred to as a ladder or a spiral all tangled up.
Each Strand of DNA consists of a Nucleus, chromosomes, and a gene.
Nucleus is known as the control center of the cell and contains the chromosomes and the gene.
Chromosomes are threadlike structures composed of DNA molecules.
Gene is a part of DNA (Spiraled double chain) containing the hereditary code.
25,000 or so genes that exist in the human body are laid out in special way that created a rodlike structure.
46 chromosomes reside in the center of virtually every cell in the body. Each child received 23 chromosomes from the father and 23 chromosomes from the mother.
The large amount of genes are identical in each child. Out of all of the genes the universal genes are those that make it possible for children to develop basic human abilities. For example, such as communicating with language, running and even forming relationships with one another. The remaining genes are are individual genes and those genes are the key factor in determining if the child will be short or tall, heavy or thin, active or calm, eager to learn new things or rely on knowledge the child already knows, be healthy or susceptible for disease and to be either emotionally acceptable or combative.
Formation of Cells
Human cells typically contain 46 chromosomes however there is an exception. Male and female reproductive cells known as gametes only have 23 chromosomes. Gametes which take the form of sperm in men and ova in women are determined in the process called meiosis. Even though meiosis begins with 46 chromosomes within a male or female germ cell. Next the germ cell doubles each chromosome and and a pair of chromosomes line up next to each other. Then, the segments of the genetic material are exchanged. The next step is crossing over which is when genes are transferred over and creates new hereditary combinations that you will not find in either of the parents chromosomes.
Boy or Girl?
When one sperm and one ovum unite at the time of conception the 23 that are given from each parent create a zygote which has a total of 46 chromosomes. The 23rd chromosome pair determines the gender of the baby.
Female- XX Chromosomes (one from the mother and one from the father)
Male- XY Chromosomes (one from the mother and one from the father)