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Unformatted text preview: genetically similar or different than the original diploid cell? 7. All organisms that result from sexual reproduction are genetically unique. This genetic individuality emerges from three sources, two of which are associated with meiosis. Describe how meiosis and sexual reproduction result in genetic variation. 8. Down syndrome results from an “accident” during meiosis. What is the scientific term for this accident? What is the chromosome constitution of gametes when this accident occurs during the first phase of meiosis I? meiosis II? Which accident is of less consequence to the resulting gametes? Chapter 8 Terms to Know: asexual reproduction autosome cell division chromatin chromosome crossing over diploid Down syndrome fertilization gamete genetic recombination haploid homologous chromosome karyotype life cycle meiosis mitosis nondisjunction sex chromosome sexual reproduction sister chromatid somatic cell tetrad trisomy 21 zygote...
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- Spring '08