Podcast
Questions and Answers
In early prophase I, each chromosome pairs with its ______ and crossing over occurs.
In early prophase I, each chromosome pairs with its ______ and crossing over occurs.
homolog
In metaphase I, pairs of homologs line up at the ______ plate.
In metaphase I, pairs of homologs line up at the ______ plate.
metaphase
During anaphase I, pairs of ______ chromosomes separate.
During anaphase I, pairs of ______ chromosomes separate.
homologous
Cytokinesis usually occurs simultaneously with ______ I.
Cytokinesis usually occurs simultaneously with ______ I.
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X-shaped regions called ______ are sites of crossovers.
X-shaped regions called ______ are sites of crossovers.
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In telophase I, each half of the cell has a haploid set of ______; each chromosome still consists of two sister chromatids.
In telophase I, each half of the cell has a haploid set of ______; each chromosome still consists of two sister chromatids.
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No chromosome replication occurs between the end of meiosis I and the beginning of meiosis ______.
No chromosome replication occurs between the end of meiosis I and the beginning of meiosis ______.
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In animal cells, a cleavage ______ forms during cytokinesis.
In animal cells, a cleavage ______ forms during cytokinesis.
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Mutations are the original source of genetic ______.
Mutations are the original source of genetic ______.
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Different versions of genes created by mutations are called ______.
Different versions of genes created by mutations are called ______.
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The behavior of chromosomes during ______ and fertilization is responsible for variation.
The behavior of chromosomes during ______ and fertilization is responsible for variation.
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Independent assortment of ______ is one mechanism that contributes to genetic variation.
Independent assortment of ______ is one mechanism that contributes to genetic variation.
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Homologous pairs of chromosomes orient randomly at ______ I of meiosis.
Homologous pairs of chromosomes orient randomly at ______ I of meiosis.
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The number of combinations possible when chromosomes assort independently is represented by ______.
The number of combinations possible when chromosomes assort independently is represented by ______.
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For humans, with a haploid number of ______, there are over 8 million possible combinations of chromosomes.
For humans, with a haploid number of ______, there are over 8 million possible combinations of chromosomes.
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One of the mechanisms that increases genetic variation is ______ over.
One of the mechanisms that increases genetic variation is ______ over.
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A gamete contains a single set of chromosomes and is thus a ______ cell.
A gamete contains a single set of chromosomes and is thus a ______ cell.
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The haploid number for humans is ______.
The haploid number for humans is ______.
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Meiosis reduces the number of chromosome sets from ______ to haploid.
Meiosis reduces the number of chromosome sets from ______ to haploid.
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Meiosis consists of two consecutive cell divisions known as meiosis ______ and meiosis II.
Meiosis consists of two consecutive cell divisions known as meiosis ______ and meiosis II.
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Each daughter cell at the end of meiosis has only half as many ______ as the parent cell.
Each daughter cell at the end of meiosis has only half as many ______ as the parent cell.
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In mitosis, sister chromatids __________ at the end of metaphase.
In mitosis, sister chromatids __________ at the end of metaphase.
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During __________ I, homologs separate.
During __________ I, homologs separate.
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In meiosis, cohesins are cleaved along the chromosome arms in __________ I.
In meiosis, cohesins are cleaved along the chromosome arms in __________ I.
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The duplicated chromosomes line up during __________ in both mitosis and meiosis.
The duplicated chromosomes line up during __________ in both mitosis and meiosis.
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Sister chromatids separate during __________ II of meiosis.
Sister chromatids separate during __________ II of meiosis.
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The parent cell in mitosis has a chromosomal number of __________.
The parent cell in mitosis has a chromosomal number of __________.
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The process of __________ involves the duplication of chromosomes.
The process of __________ involves the duplication of chromosomes.
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____________ allows sister chromatids to stay together during meiosis I.
____________ allows sister chromatids to stay together during meiosis I.
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During ______ I, nonsister chromatids are held together during synapsis.
During ______ I, nonsister chromatids are held together during synapsis.
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The process of ______ and crossing over occurs during synapsis.
The process of ______ and crossing over occurs during synapsis.
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During meiosis, the ______ plate is where chromosomes align before separation.
During meiosis, the ______ plate is where chromosomes align before separation.
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In ______ I, the breakdown of proteins holding sister chromatid arms together occurs.
In ______ I, the breakdown of proteins holding sister chromatid arms together occurs.
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The result of crossing over is the formation of ______ chromosomes.
The result of crossing over is the formation of ______ chromosomes.
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Chiasma formation occurs during ______ I of meiosis.
Chiasma formation occurs during ______ I of meiosis.
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Sister chromatids are held together at the ______.
Sister chromatids are held together at the ______.
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Anaphase ______ is where sister chromatids are separated and pulled towards opposite poles.
Anaphase ______ is where sister chromatids are separated and pulled towards opposite poles.
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Crossing over produces recombinant chromosomes, which combine DNA inherited from each _____
Crossing over produces recombinant chromosomes, which combine DNA inherited from each _____
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Crossing over contributes to _____ variation by combining DNA from two parents into a single chromosome
Crossing over contributes to _____ variation by combining DNA from two parents into a single chromosome
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In humans, an average of one to three crossover events occurs per _____
In humans, an average of one to three crossover events occurs per _____
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The pair of homologs forms a structure called a _____ during synapsis
The pair of homologs forms a structure called a _____ during synapsis
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After crossing over, chromosomes move to the _____ I plate
After crossing over, chromosomes move to the _____ I plate
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Nonsister chromatids are involved in _____ I of meiosis
Nonsister chromatids are involved in _____ I of meiosis
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Synapsis and crossing over facilitate genetic ____ in gametes
Synapsis and crossing over facilitate genetic ____ in gametes
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