Question

Worksheet on Cell Division Define: a) Haploid: b) Diploid: c) sister chromatids: d) homologous pairs: e) crossing over f) Independent Assortment How is cancer a disease of the cell cycle? What is the difference between asexual and sexual reproduction? What are the benefits of each? What is the difference between the centriole and the centromere? At what phase is the DNA most difficult to see under a microscope? Explain. What phase involves the separation of sister chromatids towards opposite poles of the cell? Are the newly formed daughter cells equal and identical in all ways? Same size?

Answer 1

Now this is the questionare of several question. So we need to explain only First question with A, B, C,D

Now lets start:--

A). Haploid:-- Haploid is the half set of chromosomes from full set in a cell means denoted by "n". eg. Humans have 23 chromosomes from 46 chromosomes in a cell. So that cell with 23 is Haploid(n).

B). Diploid:-- Full set of chromosomes in a cell. eg. 46 in human cell.

C).Sister chromtaids:-- Chromosomes bearing four ends arising from centeromere. And these ends or extends are known as chromatids. Chromatids are in pair or toward one end is called sister chromatids

D). Homologus pair:-- Pair chromosomes of similar length and attaches side by side is called homologus pair. They have similar locus or loci for genes.