ch 13

Question 1

genes

Answer 1

units of heredity

Question 2

locus

Answer 2

a gene’s location on a chromsome

Question 3

Mitosis

Answer 3

cell division resulting in 2 daughter cells identical to parent cell

Question 4

mitosis is responsible for

Answer 4

asexual reproduction

Question 5

mitosis function is

Answer 5

repair, and maintenance

Question 6

Meiosis

Answer 6

cell division resulting in haploid gametes

Question 7

haploid gametes are

Answer 7

sex cells

Question 8

Meiosis is responsible for

Answer 8

sexual reproduction

Question 9

meiosis function is

Answer 9

gamete formation

Question 10

meiosis function is

Answer 10

genetic variablity

Question 11

diploid chromosome number

Answer 11

46

Question 12

one set from father and one set from mother, how many from each?

Answer 12

23

Question 13

sexual reproduction involves

Answer 13

• meiosis
• gamete production
• fertilization

Question 14

sexual reproduction produces

Answer 14

genetic variation among offspring

Question 15

Stages in Meiosis I

Answer 15

• prophase I
• metaphase I
• anaphase I
• telophase I

Question 16

Prophase I

Answer 16

• each duplicated chromosomes pair with it homologue
  -homogues swap segemnts
• each chromosome becomes attached to microtubles

Question 17

when crossing over in prophase 1

Answer 17

• four chromatic are aligned
• non sister chromosomes exchange segments
• new allele combinations created

Question 18

Metaphase I

Answer 18

• chromosomes are pulled into middle of cell
  -spindle is fully formed
• sister chromatids form toward one pole and others to opposite pole

Question 19

Anaphase I

Answer 19

• homologous chromosomes separate from each other
• sister chromatids remain attached

Question 20

Telophase I

Answer 20

• chrome are at opposite poles
• cytoplasm divides
• there are 2 haploid cells
  -meiosos I is completed

Question 21

Prophase II

Answer 21

• microtubles attached to depilated chromosomes
• motor proteins drive chromosomes towards the middle of spindle

Question 22

Metaphase II

Answer 22

• all duplicated chromosomes are at the spindles equator between the poles

Question 23

Anaphase II

Answer 23

• sister chromatids separate and become independent chromosomes
• motor proteins move separated chromosomes to opposite poles

Question 24

Telophase II