16- Centromers can be defined as ............................ 17- Chromatid is defined as .................................. 18- Gene locus is defined as ..................... 19- Organism genome is defined as ................................. 20- Centromere divides chromosome into ........ & ....... arms. 21- ............ is proteinaceous structure that mediates interactions between chromosomal DNA and spindlemicrotubule polymers. 22- Write on different types of chromosomes according to centromere location? and mention different shapes according to arm ratio and cetromeric index. 23- Arm ratio equals ............................./..................... 24- Centromeric index can be calculated as ......................... 25- Chromosome relative length can be calculated as ........... 26- Total length of haploid set can be calculated as ............... 27- Define the followings: Cross – Autosome - Sex chromosomes - Barr body - Allele (Allelomorph) or Alleles. 28- Choose: Chromosomes are scattered randomly throughout the cell in ............ phase of mitotic division. A- Prophase B- Metaphase C- Anaphase D- Telophase 29- Choose: Chromosomes arranged at equatorial plate in ............. phase of mitotic division. A- Prophase B- Metaphase C- Anaphase D- Telophase 30- Choose: Chromatids separate & each one move toward cell pole in ............ phase of mitotic division. A- Prophase B- Metaphase C- Anaphase D- Telophase 31- Choose: Chromosome decondense, nuclear envelope formed, cytokinesis occurs in ............ phase of meiosis. A- Prophase B- Metaphase C- Anaphase D- Telophase 32- Mitotic index is defined .......... and calculated as ........... 33- Metaphase Frequency is calculated as ........................... 34- Write on variety of asexual reproduction in organisms (in protists, animals, plants) with giving examples? 35- Define meiosis. 36- Compare between mitosis and meiosis? 37- Mention different types of asexual reproduction in six examples of plants? 38- Define endomitosis