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Topic 3
vocabulary
13
Science
9th Grade
09/28/2016

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Term
DNA
Definition
deoxyribonucleic acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
Term
Genetic code
Definition
the nucleotide triplets of DNA and RNA molecules that carry genetic information in living cells.
Term
cromosomes
Definition
a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
Term
Genes
Definition
(in technical use) a distinct sequence of nucleotides forming part of a chromosome, the order of which determines the order of monomers in a polypeptide or nucleic acid molecule which a cell (or virus) may synthesize
Term
alleles
Definition
one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
Term
mitosis
Definition
a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus.
Term
mieosis
Definition
a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
Term
trait
Definition
distinguishing quality or characteristic, typically one belonging to a person.
Term
purebred
Definition
bred from parents of the same breed or variety.
Term
hybrid
Definition
he offspring of two plants or animals of different species or varieties, such as a mule (a hybrid of a donkey and a horse).
Term
dominate trait
Definition
a trait that is most likely to occur
Term
recessive trait
Definition
A trait that is most likely to not occur
Term
incomplete dominance
Definition
Incomplete dominance is a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele.
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