treatment of root tip meristem cells with the microtubule inhibitor colchicine results in all of the folleowing except 1) induction of polyploidy 2)prevention of cytokinesis 3)cessation of DNA replication 4) prevention of chromosome segregation
Answers
Answer:
Polyploidy was first discovered in 1907 and was thought to be responsible for increasing the number of genomic copies that are heritable [1]. Polyploidy is the condition of having more than two sets of chromosomes [2] and also acts as an important mechanism for plant evolution. Paleopolyploidy is commonly practiced in plants and is the most important feature in the evolutionary history of all land plants [3]. It has been observed that approximately every plant has somehow experienced polyploidy at specific point during their evolution. However, most plants have experienced recent chromosome duplication, known as neopolyploidy. Almost 70% of flowering plants (angiosperms) have undergone polyploidy several times during their evolution [4]. Polyploidy leads to changes in gene dosage that causes chromosomal rearrangements, epigenetic remodeling and reunion of divergent gene regulatory hierarchies. These changes may bring out novel variations or may result in speciation and reproductive isolation [5]
Answer:
The answer is option d
Explanation:
Colchicine leads to induction of polyploidy, which happens when mitosis is inhibited during the cell division which happens by the inhibition of the segregation of chromosome.