8.4.1 Independent Assortment – Flashcards
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During anaphase I of meiosis
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During anaphase I homologous chromosomes separate and migrate to opposite poles. After cytokinesis, each cell produced will have one of each homologous chromosome.
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True or false?
Homologous chromosomes randomly align at the metaphase plate during meiosis.
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true
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If a cell has a diploid number of six chromosomes, and crossing over does not take place between the homologous chromosomes, how many different chromosomal combinations are possible in the resulting daughter cells after meiosis? (Each homologous pair consists of a maternal chromosome and a paternal chromosome).
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There will be eight possible chromosomal combinations resulting from an organism with a diploid number of six. Each homologous pair consists of two chromosomes that can be separated into two different daughter cells (thus there are two possible combinations for each homologous pair). A cell with a dipoid number of six has three homologous pairs of chromosomes. The different types of daughter cells that can result from meiosis are 2 × 2 × 2 = 8.
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Which statement regarding independent assortment is true?
Paternal chromosomes align on one side of the metaphase plate and maternal chromosomes align on the other side of the metaphase plate.
Independent assortment increases genetic variation in both sexual and asexual reproduction.
Independent assortment is the result of the random orientation of homologous pairs of chromosomes along the metaphase plate.
Independent assortment takes place 50% of the time.
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Independent assortment is the result of the random orientation of homologous pairs of chromosomes along the metaphase plate.
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Which of the following statements is not true regarding independent assortment?
The arrangement of chromosomes before synapsis determines how chromosomes will be separated.
Independent assortment generates genetic variation between gametes.
All arrangements of chromosomes along the metaphase plate are equally probable.
Homologous chromosomes assort independently during meiosis.
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The arrangement of chromosomes before synapsis determines how chromosomes will be separated.
Explanation: The arrangement of chromosomes along the metaphase plate determines how chromosomes will be separated.
