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25 Cards in this Set
- Front
- Back
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Meiosis- prophase
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nuclear disappears, chromatin condenses and form chromosomes that are visible, and each chromosome consists of 2 chromatids joined at centromere
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Meiosis-metaphase
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chromosomes line up at the metaphase plate
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Meiosis- anaphase
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microtubules shorten and/or lengthen and centromeres divide. Shape enlongates and chromosomes are pulled to the opp. side
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Meiosis- telaphase
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microtubules continue to elongate, nuclei and nuclear envelope forms, chromosomes uncoil into chromatin fiber
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Meiosis-Cytokinesis
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evidenced by cleavage furrow in animals cells and cell plate in plant cells
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heredity
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passing of genes from parents to offspring
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variation
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inherited different with in a species
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DNA
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nucleic acid polymer with 4 bases
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genes
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units of heredity made of DNA found on the chromosomes
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somatic cell
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any cell that is not a sperm or egg....have 46 chromosomes
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karyotype
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picture of chromosomes to see disorders
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homologous chromosomes
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have same centromere; position; location and length
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how are homologous chromosomes different from one another
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have different alleles-genes
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autosome
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non-sex chromosome
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sex chromosome
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disimilar chromosomes that determine an indv. sex
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diploid
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cell contains 2 sets of chromosomes
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haploid
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cells contain 1 set of chromosomes...only 23
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gamete
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haploid reproductive cells
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fertilization
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union of 2 gametes
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zygote
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diploid cell results from fusion of gametes
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meiosis-interphase 1
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chromosomes replicate and centriole pairs in animal cells also replicate
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meiosis-prophase 1
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replication of DNA, 90% of meisois is in prophase 1, chromosomes come together as pairs,
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meiosis-metaphase 1
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centromeres(tetrads) align at plate
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meiosis-anaphase 1
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chromosomes are moved to opp sides of cell
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meiosis-telaphase 1
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cytokinesis occurs and daughter celsl are formed, each pole has a haploid set of chromosomes,
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