BIO SCI 93 Lecture Notes - Lecture 21: Sister Chromatids, Somatic Cell, Telophase

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lavendermouse872

17 Nov 2018

School

UC-Irvine

Department

Biological Sciences

Course

BIO SCI 93

Professor

WOOD, M., GREEN, K., BUSCIGLIO, J

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BIO SCI 93 Lecture Notes - Lecture 19: Dna Replication, Cell Cycle, Oncogene

BIO SCI 93 Lecture Notes - Lecture 21: Sister Chromatids, Somatic Cell, Telophase

BIO SCI 93 Lecture Notes - Lecture 23: Mendelian Inheritance, Heredity, Gamete

Document Summary

Meiosis- cell division used in sexual reproduction for gametes formation. Somatic cells have specific # of chromosome. Human cells= 46, 23 pairs of homologous chromosomes. Metaphase i: chromosome lines up as homologous pairs in the middle. Anaphase i: each pair of chromosomes are separated. Telophase i and cytokinesis: 2 haploid forms, each chromosome has 2 sister chromatids https://sites. google. com/site/cundiffbiologyportfolio/home/science-as-a-process/meiosis. Another round of cell division, sister chromatid separates. Dna replication- happens in both mitosis and meiosis during interphase. Divisions: 1 in mitosis, 2 in meiosis. Synapsis and crossing over- mitosis doesn"t occur, meiosis form tetrads in prophase 1. Daughter cells/ genetic composition- 2 diploid identical to parent cell in mitosis; 4 haploids different fm parent cell and each other in meiosis. Role in animal bodies- produce cell for growth and tissue repair in mitosis, produce gametes in meiosis. When a pair of homologous chromosome doesn"t separate. Not separating is called nondisjunction, can happen in 2 diff times.

Related Questions

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

If the diploid chromosome number is 12, each cell has as 6 x 10 -6 grms of DNA, how many chromosomes, chromatids and DNA would you find in the following stages of cell division of a cell. (Assume cytokinesis after anaphase)

Stage of Cell Division	# of Chromosomes	# of chromatids	Amount of DNA
Prophase of mitosis
Prophase of meiosis I
Metaphase of mitosis
Anaphase of mitosis
Metaphase of meiosis I
Anaphase of meiosis I
Telophase of mitosis
Telophase of meiosis I
Metaphase of meiosis II
Telophase of meiosis II

turquoisecrow717

Determine whether the following applies to mitosis, meiosis, orboth; also identify the specific stage of cell division thatapplies (e.g. mitosis prophase, meiosis anaphase II, etc)

1) chromosomes pairs line up across the center of the cell

2) sister chromatids seperate

3) spindle fibers separate homologous chromosomes

4) 4 haploid daughter cells are produced

5) a cell 1st undergoes DNA replication

6) chromosomes line up single file across the middle of thecell

7) sister chromatids separate from each other

8) 2 haploid daughter cells form

9) the nuclear membrane re forms

10) spindle fibers attach to pairs of homologous chromosomes

11) the nuclear membrane begins to dissolve

12) centrosomes duplicate

13) synapsis and crossing over occurs

14) 2 diploid daughter cells form

turquoiseporpoise808

BIO SCI 93 Lecture Notes - Lecture 21: Sister Chromatids, Somatic Cell, Telophase

BIO SCI 93 Lecture Notes - Lecture 19: Dna Replication, Cell Cycle, Oncogene

BIO SCI 93 Lecture Notes - Lecture 21: Sister Chromatids, Somatic Cell, Telophase

BIO SCI 93 Lecture Notes - Lecture 23: Mendelian Inheritance, Heredity, Gamete

Document Summary

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