Genetics - Q1

Question 1

dna

Answer 1

deoxyribonucleaic acid

Question 2

chromatin

Answer 2

chromosomes before cell division

Question 3

of cells each somatic cell has +name

Answer 3

46, diploid

Question 4

of cells each gametes have +name

Answer 4

23, haploid

Question 5

sister chromatids

Answer 5

og chromosome and its replicated half

Question 6

chromatid

Answer 6

replicated chromosome

Question 7

centromeres

Answer 7

a structure that holds the sister chromatids together

Question 8

karyotic

Answer 8

full set of human chromosomes

Question 9

xy

Answer 9

male

Question 10

xx

Answer 10

female

Question 11

homologous chromosomes

Answer 11

one sister chromatid pair from each parent

Question 12

gene

Answer 12

a section of chromosomes and has code for a protein

Question 13

4 bases of dna

Answer 13

adenine, cytosine, guanine, thymine

Question 14

what pairs w/ what for dna

Answer 14

a-t, c-g

Question 15

why do cells divide?

Answer 15

reproduction (for single celled organisms, as asexual reproduction), growth (fertilized egg must grow to become millions of cells), repair (give rise to new and repaired tissues and cells)

Question 16

spindle fibres

Answer 16

microtubule structure that facilitates the movement of chromosomes within a cell

Question 17

centrosomes

Answer 17

a structure that helps from spindle fibres

Question 18

difference of mitosis in plants

Answer 18

A cell plate grows to form a cell wall

Question 19

meiosis

Answer 19

produces sex cells for sexual reproduction, happens in ovaries and testes

Question 20

sex cells name

Answer 20

gametes

Question 21

production of sperm cells

Answer 21

spermatogenesis

Question 22

prod of egg cells

Answer 22

oogenesis

Question 23

one round of mitosis forms how many sperm cells

Answer 23

4

Question 24

one round of mitosis forms how many egg cells

Answer 24

4, but only 1 matures and survives

Question 25

how are the cells different from mitosis

Answer 25

each are geneticllly unique while the cells in mitosis are identica

Question 26

during fertilization, a haploid sperm and egg cell unite to form a diploid...

Answer 26

zygote

Question 27

what happens during interphase of meiosis -compared to mitosis

Answer 27

interphase happens only one in meiosis even tho there are 2 rounds of division

Question 28

synapsis

Answer 28

when chromosomes come tgt in homologous pairs (2 pairs of chromosomes)

Question 29

what is the structure made from synapsis called

Answer 29

tetrad

Question 30

crossing over

Answer 30

small segments of adjacent chromosomes are broken and exchanged w/ e/o