Bio 141 Notes (3/20/14)

Question 1

Cells must _____ their DNA before they can divide

Answer 1

double

Question 2

Sister Chromatids are

Answer 2

identical

Question 3

Homologus

Answer 3

same length, same centromere position, same genes in the same order

Question 4

Mitosis

Answer 4

Several defined phases
divide coped DNA between 2 daughter nuclei
cytokinesis
happens in SOMATIC cells

Question 5

Cytokinesis

Answer 5

one CELL into two

Question 6

Somatic

Answer 6

body cells

non sex cells

Question 7

Mitosis vs Meiosis

Answer 7

Mitosis - somatic cells, exact copies

Meiosis - sex cells, 2n-> n

Question 8

Interphase

Answer 8

span of time when the cells are not actively dividing
chromosomes are loosely arranged
eukaryotic

Question 9

Prophase

Answer 9

Chromosomes coil (become recognizable)
X shape (2 exact copies, joined together at centromere)
nuclear envelope dissolves

Question 10

Metaphase

Answer 10

chromosomes line up along median plane/equator

microtubles pull centromeres towards poles

Question 11

Anaphase

Answer 11

sister chromatids separate and begin moving toward opposite poles

Question 12

Telophase

Answer 12

Chomosomes reach poles at each end of cell
relax into loose strands again
nuclear membrane reforms

Question 13

Cytokinesis

Answer 13

mitosis dividing 1 nucleus into 2

cytokinesis dividing 1 cell into 2

Question 14

Mitosis happens at area of …

Answer 14

Growth

Question 15

Number of nuclear division

Answer 15

Mitosis - one

Meiosis - two

Question 16

Number of cell dividions

Answer 16

Mitosis - one

Meiosis - two

Question 17

End number of cells

Answer 17

Mitosis - two

Meiosis - Four

Question 18

End DNA relative to starting cell

Answer 18

Mitosis - same

Meiosis - half