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Genetics: Mitosis & Mieosis
N/A
17
Biology
9th Grade
04/29/2010

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Term
Diploid
Definition
Contain two sets of chromosomes, one set from each parent.
Term
Haploid
Definition
Contain only one of each type of chromosome.
Term
Gamete
Definition
Sex cells (Egg & Sperm)
Term
Mieosis
Definition

The division resulting in a reduction in chromosome number. There are two stages (Meiosis I & Meiosis II)'

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Term
Meiosis I
Definition
Chromosome pairs replicate, resulting in two haploid daughter cells with duplicated chromosomes different from the original diploid cell.
Term
Meiosis II
Definition
The haploid cells from Meiosis I divide & results in four gametes.
Term
Homologus
Definition
Two chromosomes containing the same type of genes.
Term
Non-Homologous
Definition
Two chromosomes containing different types of genes.
Term
Tetrad
Definition
A visible cluster of four chromatides. Occurs during prophase I
Term
Crossin Over
Definition
Exchanging of chromosomes genetic material between pairs. Occurs during Prophase I.
Term
Phenotype
Definition
Physical taits.
Term
Genotype
Definition
Gene code. Unlike phenotype, this can't be seen.
Term
Law of Dominance
Definition
Some allells are dominant and others are recessiv.
Term
Law of Segregation
Definition
Explains how allelles are seperated during meiosis.
Term
Law of Independent Assortment
Definition
Segregation of allelles for o trait does not hold true for another trait.
Term
Incomplete Dominance
Definition
One allelle is not completely dominant over another.
Term
Co-Dominance
Definition
Both allels for a gene are expressed completely.
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