Biology 1001A Lecture 5: BIOLOGY LECTURE 5.docx

40 views4 pages

jadebeaver77

15 May 2012

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Questions: chap 10 questions 1, 2, 3, 4. Self-study: 10. 2c generalized transduction and transformation (fig. Review of 10. 3 (pg 225 see fig 10. 13 to 10. 6) 1st assessment online mini test lecture 2 through 5 30 min: no outside source allowed. Opens 8:00am friday and closes 11. 59 pm sun oct 2. Focus on cytoskeleton not just on dna and chromosomes. Chromosomes are present all the time in the nucleus. Can"t see them as separate structure all the time only when condensed can they be seen. Everything will line up along the metaphase plate and the spindles will attach to kinetochore of each chromosome. Chromatid is one side of replicated chromosome. Chromatin is all the chromosomes and protein in nucleus. Cell cycle check point won"t proceed beyond metaphase until all of the chromosomes are attached to microtubules only then will to proceed to anaphase. Chromatids are separated, pulled apart and migrate to opposite polls.

Related Questions

Daughter cells resulting from meiosis:

(a) have only one member of each homologous pair
(b) have only one member of each pair of alleles
(c) have half as many chromosomes as the parent cell
(d) all of these
(e) none of these.

The centromere is a region in which:

a) chromatids remain attached to one another until anaphase.
b) metaphase chromosomes become aligned at the metaphaseplate.
c) chromosomes are grouped during telophase.
d) the nucleus is located prior to mitosis.
e) new spindle microtubules form at either end.

In the cells of some organisms, mitosis occurs without cytokinesis.This will result in:

a) cells with more than one nucleus.
b) cells that are unusually small.
c) cells lacking nuclei.
d) destruction of chromosomes.
e) cell cycles lacking an S phase.

Which of the following does not occur during mitosis?

a) condensation of the chromosomes
b) replication of the DNA
c) separation of sister chromatids
d) spindle formation
e) separation of the spindle poles.

6. Meiosis and mitosis are both processes that involve nucleardivision. What is the difference between the two?

7. Daughter cells resulting from meiosis:

a) have only one member of each homologus pair
b) have only one member of each pair of alleles
c) have half as many chromosomes as the parentcell
d) all of these
e) none of these.

8. The centromere is a region in which:

a)chromatids remain attached to one another untilanaphase.
b) metaphase chromosomes become aligned at the metaphaseplate.
c) chromosomes are grouped during telophase.
d) the nucleus is located prior to mitosis.
e) new spindle microtubules form at either end.

9. Which of the following does not occur duringmitosis?

a) condensation of the chromosomes
b) replication of the DNA
c) separation of sister chromatids
d) spindle formation
e) separation of the spindle poles.

10. What is the relationship between interphase and celldivision? (Why are they both needed?)

viridianmanatee98

What would likely happen if sister chromatids separated beforekinetochore microtubules where attached to the chromosomes in ahuman skin cell? Mitosis would start over Mitotic spindle wouldcollapse Prophase would not be completed Daughter cells wouldlikely have aneuploidy Cell plate formation would be disrupted

periwinklefox543

Biology 1001A Lecture 5: BIOLOGY LECTURE 5.docx

Document Summary

Get access

Related Documents

Biology 1001A Study Guide - Telophase, Zygote, Meiosis

BIOL 121 Lecture Notes - Microtubule Organizing Center, Spindle Apparatus, Sister Chromatids

BIOL 121 Chapter Notes -Microtubule Organizing Center, Spindle Apparatus, Sister Chromatids

Related Questions