The other strand is formed in short segments okazaki

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The other strand is formed in short segments (Okazaki fragments) in the 3’ tp 5’ direction. The segments are joined together by DNA ligase
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a. The parent molecule has two complementary strands of DNA. Each base is paired by hydrogen bonding with its specific partner, A with T and G with C b. The first step in replication is separation of the two DNA strands c. Each parental strand now serves as a template that determine the order of nucleotides along a new complementary strand.
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DNA Replication Hypothesis a. Conservative model – The parental double helix remains intact and an all new copy is made. b. Semiconservative model – The two strands of the parental molecule separate, and each functions as a template for synthesis of a new complementary strand. c. Dispersive model – Each strand of both daughter molecules contains a mixture of old and newly synthesized parts. Nuclear Division: Mitosis 1. Prophase – The chromatin fibers change into chromosomes 2. Metaphase – Microtubules align the centromeres of chromatid pairs at the metaphase plate 3. Anaphase – The chromatid pairs split at the centromere and move to opposite poles of the cell; the chromatids are now called chromosomes 4. Telophase – The identical nuclei are formed around the identical sets of chromosomes now in their chromatin form Reproductive Cell Division During sexual reproduction each new organism is the result of the union of two gametes ( fertilization ) , one from each parent Meiosis – reproductive cell division that occurs in the gonads ( ovaries & testes ) that produces gametes with half the number of chromosomes Haploid cells – Gametes contain a single set of 23 chromosomes Fertilization restores the diploid number of chromosomes (46)
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  • DNA,  Function

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