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IS2 Critical Vocabulary

Across
A diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum.
The process by which information from a gene is used in the synthesis of a functional gene product.
An undifferentiated cell of a multicellular organism which is capable of giving rise to indefinitely more cells of the same type, and from which certain other kinds of cell arise by differentiation.
The action or process of differentiating
The opening of the central cavity of an embryo in the early stage of development.
An unborn offspring of a mammal, in particular an unborn human baby more than eight weeks after conception.
A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes
The outermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the epidermis and nerve tissue.
A unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
An animal embryo at the early stage of development when it is a hollow ball of cells.
The middle layer of an embryo in early development, between the endoderm and ectoderm.
Having a single set of unpaired chromosomes.
Down
The process by which a gastrula forms from a blastula.
The action or process of fertilizing an egg, female animal, or plant, involving the fusion of male and female gametes to form a zygote.
Any cell of a living organism other than the reproductive cells.
A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
Deoxyribonucleic acid, a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
The innermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the lining of the gut and associated structures.
A mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote.
Containing two complete sets of chromosomes, one from each parent.
An unborn or unhatched offspring in the process of development, in particular a human offspring during the period from approximately the second to the eighth week after fertilization.
Any of a class of nitrogenous organic compounds that consist of large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms, especially as structural components of body tissues such as muscle, hair, collagen, etc., and as enzymes and antibodies.