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Chapter 3 Heredity and Environment

Horizontales
Affected by many genes.
It is known as the different variations of the polymorphic genes.
It is the entire pack of instructions to make a living organism.
A molecule that contains all of the information necessary to build and maintain an organism (it is most commonly abbreviated into three letters).
Each humans reproductive cell. They contain 23 chromosomes.
A condition in which a person has only an X chromosome causing underdeveloped female organs and other anomalies.
This is a extra-chromosome condition also called trisomy-21 because a person with this condition has three copies of chromosome 21.
Verticales
It stores the DNA molecules. Humans have a total of 46 of them.
This is the most common condition in which a person has three sex chromosomes instead of two.
Multiple births occur when the zygote cell splits. One separation of the cell results in...
It is created through the fusion of two gametes (sperm and ovum).
Thin is a fatal central nervous system disorder caused by a genetic miscode.
They began life as two separate zygotes created by the fertilization of two ova by two sperm at roughly the same time (Also known as fraternal twins).
It is defined as the inability to conceive after at least a year of trying.
They are created from an incomplete split of the zygote.
Influenced by many factors.
If the gene from one parent is exactly like the gene from the other parent, that gene pair is said to be...
It portrays a person’s chromosomes. It is a cell that is grown in a laboratory, magnified, and then usually photographed.
A female reproductive cell. (singular)
A male reproductive cell. (singular)