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Gametes are produced by _____________. |
Meiosis |
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Normal human gametes carry _____ chromosomes. |
23 |
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Once Meiosis I is completed, all the cells are |
Haploid |
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A diploid organism whose somatic (nonsex) cells each contain 32 chromosomes produces gametes containing _____ chromosomes. |
16 |
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Meiosis II begins with 2 _________ cells |
Haploid |
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Meiosis I produces _____ cells, each of which is _____. |
two, halpoid |
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Meiosis II typically produces _____ cells, each of which is _____. |
four, haploid |
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During _____ sister chromatids separate. |
Anaphase II |
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At the end of _____ and cytokinesis, haploid cells contain chromosomes that each consist of two sister chromatids. |
Telophase I |
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Homologous chromosomes pair during _________ |
Prophase I |
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Synapsis occurs during _____. |
Prophase I |
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Homologous chromosomes migrate to opposite poles during _____. |
Anaphase I |
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During _____ chromosomes align single file along the equator of a haploid cell. |
Metaphase II |
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During _____ a spindle forms in a haploid cell. |
Prophase II |
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A human somatic cell contains _____ |
44 autosomes and 2 sex chromosomes |
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In alternation of generations, the diploid stage of a plant that follows fertilization is the _____. |
sporophyte |
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Mitosis results in the formation of _____ |
two diploid cells |
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Meiosis results in the formation of ______ |
two haploid cells |
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Crossing over is _____. |
the exchange of homologous portions of nonsister chromatids |
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Genetic variation occurs when chromosomes are shuffled in _____ and fertilization. |
Meiosis |
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What is the Haploid Number? |
23 |
|
Diploid number is ______ |
46 |
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What is the result of meiosis |
one set of chromosomes in each gamete |
|
Casmata |
where they cross over |
|
What are the only haploid cells in animals |
Gametes |
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Sporophyte makes haploid ________ by meiosis |
spores |
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Each spore grows by mitosis into a haploid organism by called a ________ |
gametophyte |
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Fertilization of gametes results in a ____________ |
diploid sporophyte |
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The zygote produces haploid cells by ________ |
meiosis |
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Only ______ cells can go through meiosis |
diploid |
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The two cell divisions result in ________ daughter cells, rather than _________ daughter cells in mitosis |
4,2 |
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Each daughter cells has _______ as many chromosomes as the parent cell |
half |
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What happens during the first stage of Meiosis |
homologous chromosomes seperate |
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What is reductional division? |
meiosis one results in 2 haploid daughter cells |
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What is equational division |
Meiosis II results in 4 haploid daughter cells with UNREPLICATED chromosomes |
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When does synapsis occur |
Prophase I |
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What is a chiasmate? |
where the x-shaped regions where crossing over occured |
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Are the two sister chromatids gentically similar during Metaphase II |
no! |
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What are cohesions? |
protein complexes |
|
What are alleles |
mutations of genes |
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