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Unformatted text preview: 7. Define gamete, somatic cells, zygote. 8. Describe 3 sources of genetic variation in a sexually-reproducing population. 9. Two chromosomes in a nucleus that carry genes for the same traits at the same loci, but specify different versions of the same traits, are called _____________________. 10. Define synapsis, tetrad, and crossing over. 11. Crossing over occurs during which phase of meiosis? 12. Why is crossing over important? 13. What is nondisjunction? What can be the result of it? 14. What are the advantages of asexual reproduction? Disadvantages? 15. What are the advantages of sexual reproduction? Disadvantages?...
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- Spring '09