BIOL 261 QUIZ 2

Question 1

Each chromosome of the 23 pairs consists of 2 identical copies of DNA called:

Answer 1

sister chromatids

Question 2

sister chromatids are attached at the:

Answer 2

centromere

Question 3

Interphase:

Answer 3

replications

Question 4

mitosis:

Answer 4

• 23 paired chromosomes

- condense and pair up

Question 5

2 types of cellular division:

Answer 5

• somatic cells: mitosis (2N->2N)

- sex cells: meiosis (2N->1N)

Question 6

meiosis:

Answer 6

-23 single chromosomes

Question 7

last part of telophase:

Answer 7

cytokinesis divides the cytoplasm and the daughter cells are produced

Question 8

metaphase:

Answer 8

chromosomes line up in middle

Question 9

anaphase:

Answer 9

• centromere splits and microtubules shorten

- pulls each of the sister chromatids to opposite poles of cell

Question 10

telophase:

Answer 10

nuclear envelope forms around daughter nuclei and chromosomes uncondense

Question 11

prophase:

Answer 11

• replicated chromosomes condense
• microtubules actor at centrioles
• nuclear envelope breaks down

Question 12

cell spends 95% of its lifespan in:

Answer 12

interphase

Question 13

Interphase:
Mitosis:
Cytokinesis:

Answer 13

Dna copied
Dna split into 2 daughter cells
Parent cell split in half

Question 14

where is a telomere:

Answer 14

end of chromosomes

Question 15

Meiosis goes through:

Answer 15

Meiosis 1 and meiosis 2