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Biology Words
Vocabulary Words For Friday Exam
22
Biology
10th Grade
04/14/2011

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Term
Mitosis
Definition
Asexual reproduction; results in 2 genetically identical cells
Term
Meiosis
Definition
Sexual reproduction; results in 4 genetically different haploid cells
Term
Haploid
Definition
Having 1 set of chromosomes; n; in humans 23
Term
Diploid
Definition
Having 2 sets of chromosomes; 2n; im humans 46
Term
Chromosome
Definition
Contain genetic information; consist of DNA coiled around protein
Term
Centromere
Definition
The center of a chromosome; holds sister chromatids together
Term
Cell Cycle
Definition
The sequence of events from a newly formed cell to cell division
Term
Gamete
Definition
Sex cell; sperm and egg
Term
Trait
Definition
An inherited charactistic
Term
Allele
Definition
A version of a trait
Term
Dominant
Definition
The strong allele that always shows if present
Term
Recessive
Definition
The weak allele that only shows if dominant is absent
Term
Homozygous
Definition
Having two of the same allele for a trait
Term
Heterozygous
Definition
Having two different alleles for a trait
Term
Genotype
Definition
The genes of an individual
Term
Phenotype
Definition
The physical description of an individual
Term
Codominance
Definition
Two dominant alleles for a trait; heterozygote expresses both alleles
Term
Incomplete Codominance
Definition
One allele is more dominant than another; heterozygote is a blend
Term
Mutiple Alleles
Definition
More than 2 alleles for a trait; Human Blood Type is an example
Term
Sex-linked Traits
Definition
A gene for a trait that is carried on the X chromosome
Term
Pedigree
Definition
A graphic representation of inheritance patterns among families
Term
DNA
Definition
Deoxyribonucleic Acid
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