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Biology Honors Semester 2 Final Exam > U3P2 > Flashcards

Flashcards in U3P2 Deck (28)
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1

steps of mitosis

prophase, metaphase, anaphase, telekinesis

2

prophase

chromosomes coil up into short rods

3

cytokinesis

what happens in eukaryotic cells after nucleus divides

4

metaphase 1

stage of meiosis during which homologous pairs line up along the equator of the cell

5

meiosis

guarantees number of chromosomes in gametes is half the number of chromosomes in body cells

6

crossing over

exchange of corresponding segments of DNA that occurs during synapsis

7

haploid cells

1n, cells resulting from meiosis in either males or females

8

result of normal mitotic division

two identical daughter cells

9

mitosis

division of cell's nucleus

10

genetic variation

result of crossing over during meiosis

11

how many autosomes and sex chromosomes in each cell of human body

22 pairs autosomes, 2 sex chromosomes (determine m/f)

12

# of total chromosomes in body cells if diploid 60

60

13

metaphase 1 of mitosis

homologous pairs present

14

how does DNA compact

wraps tightly around histones

15

metaphase

arrangement of all chromosomes along equator

16

haploid (1n)

contains one copy of a chromosome- either mom or dad j

17

diploid (2n)

contains two copies of each chromosome, one mom and one dad

18

tal chromosomes in body cells in organism that has haploid 40

80

19

difference between anaphase of mitosis and anaphase 1 of meiosis

anaphase of mitosis centromere divides
anaphase 1 pairs divide and move one centromere intact

20

what would happen if chromosome number not reduced before sexual production

offspring chromosome # would double compared to parents

21

sexual reproduction

two parents, offspring genetically different, requires meiosis

22

asexual reproduction

one parent, offspring identical, requires mitosis

23

following replication of its DNA

each chromosome contains two chromatids, which are attached to each other by a centromere

24

cancer

caused by mutation in DNA

25

2n-> 2n 2n

mitosis

26

why are muscle cells different from nerve cells

express different genes

27

cell differentiation

process enabling cells to become specialized

28

epigenome

role environment plays in affecting our genomes