heredity
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4 Terms
why does the continuity of life depend on accurate dna replication?
ensures offspring/new cells receive a complete, functional set of genetic instructions necessary for survival and reproduction.
compare how binary fission, mitosis and meiosis ensure the replication of genetic material
binary fission and mitosis replicate dna to create genetically identical cells. meiosis replicates dna once but divides twice to create unique haploid cells
explain the differing roles of mitosis and meiosis in the continuity of life
mitosis allows for growth, tissue repair and asexual continuity. meiosis creates genetic variation in gametes, allowing species to adapt to changing environments.
how does fertilisation contribute to the continuity of life?
fuses two unique haploid gametes, restoring the diploid chromosome number and combining parental dna to maximise genetic variation