Molecular genetics exam 3

Question 1

The majority of our cells are diploid or haploid?

Answer 1

diploid

Question 2

Are somatic cells diploid or haploid?

Answer 2

Diploid

Question 3

are gametes diploid or haploid?

Answer 3

haploid

Question 4

n =

Answer 4

chromosome number

Question 5

the 2 in 2n represents

Answer 5

number of sets

Question 6

2n=8 so n=

Answer 6

each set has 4 unique chromosomes and there are 2 sets

Question 7

2n=6 total chromosomes is __
sets of chromosomes is __
number of unique chromosomes is __

Answer 7

6
2
3

Question 8

2n=6
total chromosomes is
number of sets is
number of pairs is

Answer 8

6
2
3

Question 9

chromatid

Answer 9

the individual part of the chromosome (1 side)

Question 10

during s phase

Answer 10

homologous chromatids are replicated to form homologous chromosomes

Question 11

Homolous

Answer 11

same but not exact

Question 12

sister chromatids

Answer 12

The individual sides on the same chromosome. Exactly the same

Question 13

Meiosis

Answer 13

specialized form of cell division that takes sexual reproduction possible

Question 14

meiosis produces

Answer 14

gametes or sex cells

Question 15

In females meiosis results in

Answer 15

eggs

Question 16

in males meiosis results in

Answer 16

sperm

Question 17

meiosis __ the genetic information passed onto daughter cells by __

Answer 17

reduces, half

Question 18

Meiosis creates genetic

Answer 18

diversity

Question 19

meiosis occurs in how many stages?

Answer 19

2

Question 20

meiosis 1 is called

Answer 20

reduction division

Question 21

meiosis 1

Answer 21

reduces the chromosomes number by half by separating homologous pairs

Question 22

meiosis 2

Answer 22

seperates sister chromatids into 2 different daughter cells

Question 23

Prophase of m1

Answer 23

chromosomes become condensed and they find homologous chromsomes pair and held together by chismata

Question 24

Crossing over occurs between

Answer 24

non sister chromatids between the homologous chromsomes

Question 25

what is the purpose of crossing over?

Answer 25

exchange genetic information

Question 26

M1 metaphase

Answer 26

paired hollows chromosomes line up together in the metaphase plate

Question 27

Independent assortment occurs in m1

Answer 27

orientation of pars to poles is random

Question 28

3 ways to create genetic diversity

Answer 28

1. crossing over
2. Independent assortment
3. Random fertilization

Question 29

M1 anaphase

Answer 29

homologous chromosomes separate and move toward poles

Question 30

m1 telophase

Answer 30

each new poles has a haploid set of chromosomes

Question 31

Meiosis 2

Answer 31

each chromosomes lines up at metaphase plate. Sister chromatids in each chromosomes separate to opposite poles. Each haploid daughter cell from meiosis 2 has one member of each pair of homologous chromosomes