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Chromosomes and chromosomeNumber Haploid and Diploid cells Meiosis 1- interphase, prophase 1, metaphase 1, anaphase 1,telphase 1 Meiosis 2 Meiosis Providing Variaions Sexual reproduction vs. Asexual reproduction importance of meiosis
Terms in this set (30)
Chromosomes & Chromosomes number
each characteristic, such as hair color, height, or eyes color, is called a TRAIT.
the "instructions" for each trait are located on CHROMOSOMES, which are found in the NUCLEUS of CELLS.
the DNA on chromosomes is arranged in segments called GENES
genes control the production of PROTEIN
EACH PARENT contributes 23 chromosomes, resulting in 23 PAIRS of chromosomes.
the chromosomes that make up a pair ( one chromosome from each parent) are called
homologous chromosomes carry GENES that control the SAME INHERITED TRAITS
Haploid and Diploid
represents the number of chromosomes in a gamete
a cell with n # chromosomes
haploid comes from the greek word meaning SINGLE
the process by which one haploid gamete combines with another haploid gamete
sex cells that have HALF the # of chromosomes
each human body cells has 46 chromosomes
a cell that conatins 2n number of chromosomes
gametes are formed
type og cell division that reduces the # of chromosomes; refered to as the REDUCTION DIVISION
meiosis involves two consecutive divisions called MEIOSIS 1 & MEIOSIS 2
cells tha undergo meiosis also go through interphase as part of the cell cycle
cells in interphase CARRY OUT VARIOUS METABOLIC PROCESS including the replication of DNA and they SYNTHESIS OF PROTEINS
as cells enter Prophase 1, the relicaated chromosomes because VISIBLE
As in mitosis, the relipcated chromosomes consit of TWO SISTER CHROMATIDS
homologous chromosomes condense = they begin to form pairs.
process during which chromosomal sehments are exchanged between a pair of homologous chromosomes.
as prophase 1 continues- CENTRIOLES move to the cell's opposite poles. SPINDLE FIBER form and bind to the sister chromarids at the CENTROMERE.
the pair of chromosomes seperate.
moves to opposite sides of the poles.
distinction between mitosis and meiosis = during metaphoase 1 of MEIOSIS 1, homologous chromosomes line up as pairs at the cell's equator.
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Key Concepts - Nucleic Acids
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