BSC1010C Lecture Notes - Lecture 22: Telophase, Mitosis, Centromere

35 views2 pages

erinserval266

14 Nov 2016

School

Department

Course

Professor

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

Document Summary

Eukaryotic cells are diploid: eukaryotic chromosomes occur in homologous pairs, humans have 23 homologous pairs of chromosomes. Meiosis vs mitosis: mitosis- start with a cell that is 2n (diploid) Mitosis occurs among the somatic cells (body cells: meiosis- start with a cell that is diploid. End up with 4 cells that are haploid. One of those cells can be combined with sperm to form a diploid cell. Meiosis only occurs among the germ cells (which give rise to egg or sperm depending on gender) Mitosis and meiosis both have interphase, prophase, metaphase, anaphase, and telophase steps. Crossing over allows homologous chromosomes to exchange chromosomal material. Meiosis produces cells that are not identical. Random orientation of pairs in meiosis i. Asexual vs sexual reproduction: sexual reproduction has genetic variety, asexual reproduction produces daughter cells that are exact copies of the parent cells. Gregor mandel and genetics: mendel determined the principles of inheritance before we knew about genes or dna.

Related Questions

Which of the following statements are false about the comparison between mitosis and meiosis? Select all. that apply.

1.Two cytokinesis events occur in mitosis but only one in meiosis

2.Meiosis results in half the number of homologous chromosome pairs as the original cell whereas mitosis has the same number as the original cell

3. Mitosis occurs in somatic cells while meiosis only occurs in germ cells

4.Both haploid and diploid cells undergo mitosis and meiosis

5.Both mitosis and meiosis have one round of DNA replication in the preceding Interphase period

6. Chromosomes undergo disjunction in mitosis but not in meiosis

7.Meiosis leads to a reductive division in the number of chromosomes whereas mitosis does not

Thank you!

Which of the following statements are false about the comparison between mitosis and meiosis? Select all. that apply. Multiple answers: You can select more than one option A Two cytokinesis events occur in mitosis but only one in meiosis B Meiosis results in half the number of homologous chromosome pairs as the original cell whereas mitosis has the same number as the original cell C Mitosis occurs in somatic cells while meiosis only occurs in germ cells D Both haploid and diploid cells undergo mitosis and meiosis E Both mitosis and meiosis have one round of DNA replication in the preceding Interphase period F Chromosomes undergo disjunction in mitosis but not in meiosis G Meiosis leads to a reductive division in the number of chromosomes whereas mitosis does not Unanswered

What is the purpose of meiosis?

To enable an organism to produce gametes

To allow for growth

To allow an organism to replace damaged cells

Question 2

Select one answer.

10 points

Mitosis results in ________ and meiosis results in ________.

gametes, somatic cells

gametes, gametes

somatic cells, somatic cells

somatic cells, gametes

Question 3

Select one answer.

10 points

Which of the following tasks is accomplished through the processof meiosis?

Cell growth

Production of sperm or eggs

Replacement of dysfunctional cells

Question 4

Select one answer.

10 points

What advantage does sexual reproduction have over asexualreproduction?

All other selections are true.

Sexual reproduction provides more genetic variability

Sexual reproduction doubles the number of chromosomes in aspecies

Sexual reproduction is more efficient

Question 5

Select one answer.

10 points

Crossing over occurs between homologous chromosomes during whatstage of cell division? (Read each option carefully.)

Prophase I of meiosis

Prophase of mitosis

Prophase II of meiosis

Interphase

Question 6

Select one answer.

10 points

Corn has 20 chromosomes. When corn undergoes meiosis how manychromosomes are found in the gametes?

Question 7

Select one answer.

10 points

Homologous chromosomes separate and are pulled to opposite sidesof the cell during what stage of cell division? (Read each optioncarefully.)

Metaphase I of meiosis

Anaphase II of meiosis

Anaphase I of meiosis

Anaphase of mitosis

Question 8

Select one answer.

10 points

Mitosis results in ______ cells and meiosis results in _______cells.

diploid, haploid

haploid, diploid

diploid, diploid

haploid, haploid

jadepug655

BSC1010C Lecture Notes - Lecture 22: Telophase, Mitosis, Centromere

Document Summary

Get access

Related Documents

BIOL 1201 : Bio Test 4

BIOSC 0150 Lecture Notes - Chromosome Abnormality, Prometaphase, Telophase

BIO 202 Chapter Notes - Chapter 13: Hermaphrodite, Oogenesis, Cytokinesis

Related Questions