When lengths of DNA are swapped from one chromatid to another
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Maternal chromosomes are
The set of chromosomes in an individual's cells that were contributed by the egg
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Paternal chromosomes are
The set of chromosomes in an individual's cells that were contributed by the sperm
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A bivalent is
A pair of synapsed (joined) homologous chromosomes during prophase and metaphase of meiosis 1
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A chromatid is
One-half of two identical copies of a replicated chromosome
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The chiasmata is
The points where non sister chromatids within a bivalent join, where they cross over
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A bivalent is
A pair of synapsed homologous chromosomes during metaphase and prophase of meiosis 1
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The correct order in meiosis 1 is
Prophase, metaphase, anaphase, telophase
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Each parent produces special reproductive cells called
Gametes
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Sister chromatids are
Sister chromatids are two identical copies of a single chromosome that are connected by a centromere.
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A centromere is
A region on a chromosome that joins two sister chromatids.
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What is chiasmata
The point at which paired chromosomes remain in contact after crossing over during meiosis
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Bivalents line up across the equator, arranged randomly, facing opposite poles - which stage is this
Metaphase 1
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In what stage does the chromatin condense and undergo supercoiling - allowing them to take up stains and be seen with a light microscope
Prophase 1
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The homologous chromosomes in each bivalent are pulled by spindle microtubules to opposite poles - which stage is this
Anaphase 1
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________is a mass of genetic material composed of DNA and proteins that condense to form chromosomes.
Chromatin
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What are centrioles
A minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division
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A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes
Chromosome
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The chromosome number in each gamete needs to be
Haploid
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In most plant cells, the cell goes straight from anaphase 1 to meiosis 2, this means it skips which step
Telophase 1
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In prophase 2, the nuclear envelope breaks down, the nucleolus disappears, chromosomes condense and...
Spindles form
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In prophase 2, the nuclear envelope breaks down, ________ the chromosomes condense and supercoil
Nucleolus disappears
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Nuclear envelopes reform around haploid daughter nuclei in which phase
Telophase 2
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'The centromeres divide and the chromatids are pulled to opposite poles by the spindle fibres, the chromatids randomly segregate'
Anaphase 2
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Bivalents line up across the equator, attatched to the spindle by centromeres, chiasmata still present, arranged randomly facing opposite poles
Metaphase 1
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Supercoil, chromosomes come together in homologous pairs forming a bivalent, non sister chromatids wrap around each other attatching at chiasmata, crossing over, nucleolus disappears, nuclear envelope disintergrates, spindle forms
Prophase 1
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Nuclear envelopes form around each set of chromosomes, cell divides by cytokinesis, interphase
Telophase 1
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Other cards in this set
Card 2
Front
Crossing over is
Back
When lengths of DNA are swapped from one chromatid to another
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