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chapter 11 vocab
biology regulars
15
Biology
10th Grade
01/24/2011

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Term
allele
Definition
any of several forms of a gene
Term
codominance
Definition
being one of two or more species that are equally dominant
Term
crossing over
Definition
the interchange of corresponding chromatid segments of homologous chromosomes with their linked genes.
Term
gamete
Definition
sex cells-a mature sexual reproductive cell, as a sperm or egg, that unites with another cell to form a new organism.
Term
gene map
Definition
an arrangement of genes on a chromosome.
Term
genetics
Definition
the science of heredity, dealing with resemblances and differences of related organisms resulting from the interaction of their genes and the environment.
Term
haploid
Definition
an organism or cell having only one complete set of chromosomes, ordinarily half the normal diploid number.
Term
homozygous
Definition
having identical pairs of genes for any given pair of hereditary characteristics.
Term
hybrid
Definition
the offspring of two animals or plants of different breeds, varieties, species, or genera, esp. as produced through human manipulation for specific genetic characteristics.
Term
independant assortment
Definition
the principle, originated by Gregor Mendel, stating that when two or more characteristics are inherited, individual hereditary factors assort independently during gamete production, giving different traits an equal opportunity of occurring together.
Term
phenotype
Definition
Term
polygenic traits
Definition
Term
punnet square
Definition
in genetics, a type of grid used to show the gametes of each parent and their possible offspring; a type of grid that can indicate all the possible outcomes of a genetic cross
Term
tetrad
Definition
a group of four chromatids formed by synapsis at the beginning of meiosis.
Term
true-breeding
Definition
A plant, that when self-fertilized, only produces offspring with the same traits. The alleles for these type of plants are homozygous.
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