Unit 2 - Meiosis
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each of the black spaces below before clicking
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| State the four features of homologous chromosomes | Same size, same gene loci, same banding pattern, same centromere location
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| What is meiosis? | 2 cycles of nuclear division called meiosis I and meiosis II to produce haploid gametes that increase genetic variation during sexual reproduction.
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| Where is meiosis located? = | Gamete mother cells and sex organs
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| What is produced at the end of Meiosis I | 2 haploid cells that are genetically different
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| What is produced at the end of Meiosis II | 4 haploid cells that are genetically different
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| Explain the term random assortment. | Separation of parental chromosomes irrespective of their maternal or paternal origin
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| Where does crossing over take place? | Chiasma(ta)
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| Explain the term crossing over | Random crossing over at chiasmata resulting in exchange of DNA between homologous pairs and recombination of alleles of linked genes.
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| In recombination, which genes will have a higher recombination frequency? | Genes that are further apart
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| State the two ways organisms can use meiosis to produce gametes. | 1.gametes are formed directly from the cells produced by meiosis. 2. mitosis may occur after meiosis to form a haploid organism; gametes form later by differentiation
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| Which stage of meiosis includes homologous chromsomes | Meiosis I
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| Where does random assortment and crossing over occur? | When homologous chromosomes pair and line up along the metaphase plate
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