Frederick County Public Schools · Web viewBinary fission Sexual reproduction Gametes Meiosis Chromosome Somatic cells Homologous pairs Haploid Diploid Fertilization Zygote Alternation

Duva’s Chapter 7 Reading Guide for Principles of Life

The Cell Cycle and Cell Division

Concept 7.1: Different Life Cycles Use Different Modes of Cell Reproduction

I. Asexual reproductiona. Ex.b. Binary fission

II. Sexual reproductiona. Gametes

b. Meiosis

c. Chromosome

d. Somatic cells

e. Homologous pairs

f. Haploid

g. Diploid

h. Fertilization

i. Zygote

III. Alternation of generations

Ex.

Concept 7.2: Both Binary Fission and Mitosis Produce Genetically Identical Cells

I. Events leading to cell divisiona. Reproductive signal

b. Replication

c. Segregation

d. Cytokinesis

II. Binary Fissiona.

b.

c.

III. Mitosisa. Produces –

b. Nucleus divides ______.

c. DNA replicates ________ during the _____ phase of the cell cycle.

IV. Cell Cyclea. Interphase

i.

ii.

iii.

b. Mitosis i.

ii.

iii.

iv.

c. Cytokinesisi.

ii.

Concept 7.3: Cell Reproduction Is Under Precise Control

I. Cell cycle regulationa. Growth factors

b. G1-S transition

c. Cyclin-dependent kinases

Concept 7.4: Meiosis Halves the Nuclear Chromosome Content and Generates Diversity

I. Produces – a. Nucleus divides _________ timesb. DNA is replicated ___________.

II. Functionsa.

b.

c.

III. Meiosis Ia. Double chromosome

i. Sister chromatid

ii. centromere

b. Tetrad

c. Crossing over

i. Recombination

ii. Genetic variation

d. Independent assortment

e. Nondisjunction

f. Aneuploidy

g. Polyploidy

h. Translocation

Comparison of Mitosis and Meiosis

Concept 7.5: Programmed Cell Death Is a Necessary Process in Living Organisms

I. NecrosisII. Apoptosis

a. b. c. Caspases

III. OncogenesIV. Tumor supressors