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CHAPTER 13 Vocabulary
Meiosis and Mitosis
26
Biology
11th Grade
11/13/2008

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Term

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What does this diagram represent?

Definition
Heredity (within rats).
Term
Define 'heredity'
Definition
The transmission of traits from one generation to the next.
Term
Define 'gametophyte'
Definition
In organisms (plants and some algae) that have alternation of generations, the multi-cellular haploid form that produces haploid gametes by mitosis. Te haploid gametes unite and develop into sporophytes.
Term
Define 'spore'
Definition
In the life cycle of a plant or alga undergoing alteration of generations, a haploid cell produced in the sporophyte by meiosis. A spore can divide by mitosis to develop into a multicellular haploid individual, the gametophyte, without fusing with another cell.
Term
Define 'variation'
Definition
Differences between members of the same species.
Term
Define 'synapses sporophyte'
Definition
A short summary or version prepared by cutting down a larger work: abridgment, abstract, brief, condensation, and epitome.
Term
Define 'tetrad'
Definition
A four-part structure that forms during the prophase of meiosis and consists of two homologous chromosomes, each composed of two sister chromatids.
Term
Define 'gene'
Definition
A discrete unit of heredity information consisting of a specific nucleotide sequence in DNA.
Term
Define 'meiosis'
Definition
A modified type of cell diction in sexually reproducing organisms consisting of two rounds of cell dictions but only one round of DNA replication.
Term
Define 'chamita'
Definition
The x-shaped, microscopically visible region where homologous nosiser chromatids have exchanged genetic material through crossing over during meiosis, the two homolog remaining associated die to sister chromatid cohesion.
Term
Define 'crossing over'
Definition
The reciprocal exchange of genetic material between no sister chromatids during telophase I of meiosis.
Term
Define 'homologous structure'
Definition
Structures in different species that are similar because of common ancestry.
Term
Define 'locus'
Definition
A specific place along the length of a chromosome where a given gene is located.
Term
Define 'diploid cell'
Definition
A cell containing two sets f chromosomes (2n), one set inherited from each parent.
Term
Define 'keryotype'
Definition
A display of the chromosome pairs of a cell arranged by size and shape.
Term
Define 'clone'
Definition
A lineage of genetically identical individuals or cells.
Term
Define 'syngamy'
Definition
To cause the fertilization of (an ovum, for example).
Term
Define 'haploid cell'
Definition
A cell containing only one set of chromosomes.
Term
Define the root word 'apsis-'
Definition
Juncture
Term
Define the root word 'tetra'
Definition
four
Term
Define the root word  'chiasm'
Definition
Marked crosswise
Term
Define the root word 'syn'
Definition
Together
Term
Define the root word 'fertil'
Definition
Fruitful
Term
Define the root word 'homo'
Definition
Like
Term
Define the root word 'haplo'
Definition
Single
Term
Define the root word 'sporo'
Definition
A seed
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