TRUE OR FALSE
4.    During the Sportion of interphase the DNA making up each monad is duplicated,and the two sister chromatids remain together in the region of thedyad called the centromere.
5.__ Cytokinesis is the term used toidentify the separation of the cytoplasm of an animal cell into twocomplete, separate cells through the action of microtubules,intermediate filaments and kinesin motor proteins.
6.__ Cells of both plants and animalshave spindle fibers present during cellular division and thesefibers are short microfilaments composed of the protein actin withassociated myosin motor proteins.
7.__ Cytokinesis in animal cellsundergoing mitosis might not occur and this results in theproduction of a cell with two nuclei, each with the diploid amountof monads present.
8.__ The process of cytokinesis inplant cells requires the correct function of myosin motor proteinsand actin microfilaments.
9.__ Most fungi, animals and protistshave a sexual life cycle that involves a clear representation ofthe alternation of generations.
10.__ Aneuploidies are usually theresult of the nondisjunction of homologs during meiosis I or thenondisjunction of monads during meiosis II.
11.__ Most types (kingdoms) ofeukaryotic organisms produce gametes as a result of meiosis ofdiploid mother cells.
12.__ Segregation of gene allelesoccurs exclusively during the second meiotic division of plants andexclusively during the first meiotic division in animals.
13.__ When asexual reproductionoccurs, the offspring produced have DNA from a single parentalsource and the offspring have less genetic variability than sexualreproduction.
14.__ The 23rd pair of chromosomes inhumans are the sex chromosomes and females are heterogametic (2types of sex chromosomes) while males are homogametic (1 type ofsex chromosomes).
15.__ All members of the Plantae haveboth a multicellular haploid (gametophyte) and multicellulardiploid (sporophyte) component of their sexual life cycle.
16.__The reduction division stage ofmeiosis is the second meiotic division (meiosis II) and this iswhen human cells go from a diploid state of 46 dyads to a haploidstate of 23 monads.
17.__ A tetrad is composed of ahomologous pair of dyad chromosomes that are involved in synapsisand crossing over may occur between homologous chromatids when thedyads are in this state.
18.__ A key function suggested for whyorganisms perform meiosis is as a mechanism of purifying selectionand the removal of deleterious (mutated) genes.
19.__ The key event(s) in thetransformation of organisms from the haploid component of theirlife cycle to the diploid component are the meiotic division ofcells and production of gametes..
20.__ In female chickens you would find somatic cells with fullyhomologous pairs of chromosomes (monads) but in males there wouldbe only mostly fully homologous pairs (monads) and one partiallyhomologous pair the sex chromosomes.
