CELL CYCLE, MITOSIS AND MEIOSIS NOTES DNA - Genetic information is stored in the DNA strand in the form of genes. DNA stands for deoxyribose nucleic acid Genes located on the DNA strand – 2 Types of DNA strands Chromatin Normal DNA, during INTERPHASE (everyday life of the cell) – Thin thread like coils, not visible by microscope Chromosomes Packaged DNA, found during MITOSIS (cell division) – Thick condensed super coiled DNA Chromatid 1 part of a chromosome – Sister Chromatid copy of the original chromatid –a Centromere point where two chromatids attach – Chromosome Number each species has its own chromosome number – Homologous chromosomes A pair of chromosomes having the same gene sequence, each derived from one – parent Eventually each homologous chromosome will form a sister chromatid before mitosis Diploid (2N) two sets of DNA – one from each parent Haploid (N) one set of DNA – Found in sex cells (egg, sperm)
CELL CYCLE, MITOSIS AND MEIOSIS NOTES DNA - Genetic information is stored in the DNA strand in the form of genes. DNA stands for deoxyribose nucleic acid Genes – located on the DNA strand 2 Types of DNA strands Chromatin – Normal DNA, during INTERPHASE (everyday life of the cell) Thin thread like coils, not visible by microscope Chromosomes – Packaged DNA, found during MITOSIS (cell division) Thick condensed super coiled DNA Chromatid – 1 part of a chromosome Sister Chromatid –a copy of the original chromatid Centromere – point where two chromatids attach Chromosome Number – each species has its own chromosome number Homologous chromosomes – A pair of chromosomes having the same gene sequence, each derived from one parent Eventually each homologous chromosome will form a sister chromatid before mitosis Diploid (2N) – two sets of DNA one from each parent Haploid (N) – one set of DNA Found in sex cells (egg, sperm)
mitosis%20and%20meiosis%20notes.docx