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1.
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How is sex determined in grasshoppers? Can you find other examples of organisms with a similar system of sex determination?
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2.
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Some marine shellfish, such as limpets, become either male or female depending on where they grow. What makes one limpet a male and another a female?
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3.
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Are there other organisms whose sex is determined by environmental factors and not by genetics factors?
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4.
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Certain human chromosomal aberrations that occur during meiosis result in eggs or sperm with two copies of the X chromosome. What happens if that gamete is fertilized? What syndrome is characterized by an XXY genotype? What syndrome is characterized by an XXX genotype? What can you learn about this syndrome?
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5.
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Another type of human chromosomal aberration results when a person inherits one X and two Y chromosomes. What event must occur during meiosis for this to happen? What syndrome is characterized by an XYY genotype? What can you learn about this syndrome?
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