Meiosis Test one

Question 1

what is the mnemonic saying for prophase 1 stages

Answer 1

leaping zebras pound down dunes

Question 2

synaptonemal zipper complex begins to dissolve bivalent chromosomes still connected at chiasmata

Answer 2

diplotene

Question 3

severing of centromeres in sister chromatids move to opposite poles

Answer 3

anaphase two

Question 4

chromosomes recondense if needed, nuclear envelope breaks down spindle apparatus re appears

Answer 4

prophase two

Question 5

membranes form around daughter cell (4)

Answer 5

telophase

Question 6

what is another name for meiosis one

Answer 6

reductional division

Question 7

bivalent pairs created (tetrad) maternal and paternal sides together X and Y chromosomes pair at PARs region recombination nodules appear along complex crossing over occurs between non sister chromatids

Answer 7

pachytene

Question 8

kinetochores of sister chromatids attach to microtubules chromosomes not identical bc of crossing over

Answer 8

metaphase two

Question 9

what are germ cells

Answer 9

cells destined for a specialized role in the production of gametes

Question 10

tetrads line up along metaphase plate sister chromatids attach to fibers from same pole kinetochores fuse to have one on each sister pair

Answer 10

metaphase one

Question 11

what is the end product of meiosis two

Answer 11

4 daughter cells (n) haploid

Question 12

what two aspects in meiosis contribute to genetic diversity

Answer 12

chance governs which paternal or maternal homologs migrate to which pole crossing over in prophase one

Question 13

chromosomes begin to thicken sister chromatids attached to centromere but not yet visible centrosomes begin to move towards opposite poles

Answer 13

leptotene

Question 14

interphase between meiosis one and two is called

Answer 14

interkinesis

Question 15

another name for meiosis two is

Answer 15

equational division

Question 16

what is the first stage of prophase one

Answer 16

leptotene

Question 17

what is the end product of meiosis one

Answer 17

2 daughter cells 2n

Question 18

if homologs of a chromosome pair do not segregate during meiosis one what happens

Answer 18

non disjunction

Question 19

chromosomes seek out homologous partner homologous pair becomes zipped together synapsis form synaptonemal complex

Answer 19

zygotene

Question 20

what is synapsis

Answer 20

when homologous pairs become zipped together to form a complex

Question 21

nuclear membranes form around chromosomes at each end of pole daughter nuclei contain one-half the number of chromosomes in original parent nucleus

Answer 21

telophase one

Question 22

chiasmata dissolve maternal and paternal homologs move to opposite sides sister centromeres stay connected

Answer 22

anaphase one

Question 23

what are the subgroups in prophase one

Answer 23

leptotene zygotene pachytene diplotene diakinesis

Question 24

further condensation of chromatids can see tetrad non sisters still attached at chiasmata nuclear envelope breaks down microtubeles and spindles apparatus begins to appear

Answer 24

diakinesis

Question 25

what happens after cytokinesis of meiosis one

Answer 25

short interphase no s phase

Question 26

what are chiasmata

Answer 26

areas where crossing over occurred