Chapter 9: Meiosis & Sexual Reproduction

Question 1

Meiosis ______ the chromosome number and scrambles alleles…..

Answer 1

Halves

Question 2

How many cells does the human have?

100
23
46
88

Answer 2

46

Question 3

Gametes are haploid send cells?

True or False

Answer 3

True

Question 4

_____ is the first cell of a new organism

Diploid
Zygote
Haploid

Answer 4

Zygote

Question 5

Autosomes and Sex chromosomes

Answer 5

Autosomes= # of chromosomes

Sex chromosomes= XX & XY

Question 6

Two homologous chromosomes exchange genetic material during prophase 1…..

Answer 6

Crossing Over

Question 7

Chromosome pairs align randomly during metaphase 1….

Answer 7

Independent assortment

Question 8

Gametes produced in meiosis are different because…

Answer 8

Crossing over (prophase 1)
Independent assortment (metaphase 1)

Question 9

____ occurs in germ cells, _____ occurs in body cells

Answer 9

Meiosis, Mitosis

Question 10

Cytokinesis occurs ____ in mitosis, but _____ in meiosis

Answer 10

Once, twice

Question 11

In fraternal twins, two sperm cells fertilize ___ separate egg cells

Answer 11

2

Question 12

In mitosis, daughter cells have the _____ chromosome number as the parent cell.

In meiosis, chromosome number is ____

Answer 12

Same

Halved

Question 13

Define Sexual Reproduction

Answer 13

DNA of the offspring comes from two parents

Question 14

Two main forms of sexual reproduction.

Answer 14

Sexual and Asexual

Question 15

Define Asexual Reproduction

Answer 15

Generates identical offspring

Organism replicates its DNA and splits the contents into 2

Question 16

Egg and sperm fuse and yields the first cell of the next generation the _____ which is diploid

Answer 16

Zygote (2n) n+n=2n

Question 17

Define Sexual Reproduction

Answer 17

Produces genetic diversity among offspring

Question 18

How do sexual and asexual differ?

Answer 18

Asexual= Mitosis

Sexual= Meiosis

Question 19

Diploid cells have how many pairs of chromosomes?

Answer 19

23

Question 20

Autosomes have chromosomes that ranges from….

Answer 20

1-22

Question 21

Chromosomes of homologous pair look alike and carry the same sequence of genes

True or False

Answer 21

True

Question 22

Define Allele and Gene

Answer 22

Allele= different versions of same gene

Gene= section of DNA that codes for specific protein

Question 23

Nondisjunction occurs in meiosis 1.

True or False

Answer 23

True

Question 24

How do haploid and diploid nuclei differ?

Answer 24

Haploid= 1 full set
Diploid= 2 full sets