HUMB1000 Lecture Notes - Lecture 14: Dna Replication, Germ Cell, Somatic Cell

60 views3 pages

beigemarten277

3 Aug 2018

School

Department

Course

Professor

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

Document Summary

Cells: somatic cell: a biological cell forming the body of a multicellular organism. Mitosis: germ cell: cells that give rise to gametes. Meiosis: gamete: cells that fuse during sexual reproduction. Cells spend the majority of their life in interphase. Mitosis: series of events that leads to the production of two cells by division of a mother cell into two daughter cells. Centrioles and spindle fibers: center of microtubule (spindle fibre) formation, before cell division, centrioles divide and double in number, move to ends of cell. 2 centrioles, located in centrosome and organize spindle fibers with branching microtubles. Chromosomes and chromatin: chromatin: dna complexed with proteins (histones, during cell division, chromatin condenses into pairs of chromatids called chromosomes. Each pair of chromatids is joined by a centromere: dna is made of many genes that control specific function. Allele: different forms of the same gene (eye colour) Not replicated as there is no centromere attaching.

Related Questions

Lab 11 Mitosis

Interphase - Chromosomes are not visible because they areuncoiled

Prophase- The chromosomes coil. The nuclear membranedisintegrates. Spindle fibers (microtubles) form. The drawing showsa cell with 8 chromosomes. Each chromosome has 2 chromatids for atotal of 16 chromatids.

Prometaphase

Metaphase - The chromosomes become aligned. The drawing shows acell with 8 chromosomes. Each chromosome has 2 chromatids for atotal of 16 chromatids.

Anaphase- The chromatids separate; the number of chromosomesdoubles. The drawing shows a cell with 16 chromosomes. Eachchromosome has 1 chromatid for a total of 16chromatids

Telophase- The cell divides into two. The chromosomes uncoil.The nucleus reforms. The spindle apparataus disassembles. Thedrawing shows a cell with 16 chromosomes. Each chromosome has 1chromatid for a total of 16 chromatids.

Ques(ons

1. What stage were most of the onion root p cells in? Does thismake sense?

2. As a cell grows, what happens to its surface area : volumerao? (Think of a balloon being blown up). How is this changing raonrelated to cell division?

3. What is the function of mitosis in a cell that is about todivide?

4. How accurate were your met predictions for each stage of thecell cycle?

5. Discuss one observation that you found interesting whilelooking at the onion root p cells.

6. What would happen if mitosis were uncontrolled?

for escience lab 11 bio 113

burgundyspider301

Lab 11 Mitosis

Interphase - Chromosomes are not visible because they areuncoiled

Prometaphase

Metaphase - The chromosomes become aligned. The drawing shows acell with 8 chromosomes. Each chromosome has 2 chromatids for atotal of 16 chromatids.

Anaphase- The chromatids separate; the number of chromosomesdoubles. The drawing shows a cell with 16 chromosomes. Eachchromosome has 1 chromatid for a total of 16chromatids

Ques(ons

1. What stage were most of the onion root p cells in? Does thismake sense?

2. As a cell grows, what happens to its surface area : volumerao? (Think of a balloon being blown up). How is this changing raonrelated to cell division?

3. What is the function of mitosis in a cell that is about todivide?

4. How accurate were your met predictions for each stage of thecell cycle?

5. Discuss one observation that you found interesting whilelooking at the onion root p cells.

6. What would happen if mitosis were uncontrolled?

for escience lab 11 bio 113

coffeeporpoise248

Question 1 (2 points)

In which phase of cell division is marked by the dissolution of the nuclear membrane, the condensation of chromosomes, and the formation of the mitotic spindle?

Question 1 options:

	prophase
	metaphase
	telophase
	anaphase

Question 2 (2 points)

The physical separation of cells during cell division is called:

Question 2 options:

	Cytokinesis
	Telophase
	Interphase
	Chromosome
	Cell plate

Question 3 (2 points)

Meiosis is necessary for sexual reproduction; the gametes formed during this process before fertilization are _______________.

Question 3 options:

	Haploid
	Diploid
	Zygote
	Homologous
	Tetrads

Question 4 (2 points)

Mitosis is the process by which a ___________ cell separates the chromosomes in its nucleus into two identical sets of nuclei.

Question 4 options:

	eukaryotic
	prokaryotic
	bacterial
	all of these are correct

Question 5 (2 points)

Which of the following statements about crossing over is INCORRECT?

Question 5 options:

	It occurs between homologous chromosomes
	It allows for two parents to produce many different types of offspring
	It contributes to genetic diversity in a population
	It occurs during prophase I of mitosis

HUMB1000 Lecture Notes - Lecture 14: Dna Replication, Germ Cell, Somatic Cell

Document Summary

Get access

Related Documents

HUMB1000 Lecture Notes - Lecture 12: Telophase, Microtubule, Centromere

BIOL 084 Chapter Notes - Chapter 6: Synapsis, Nuclear Membrane, Prophase

BIOL 1010U Lecture Notes - Lecture 16: Growth Factor, Protein Kinase, P53

Related Questions