EXAM 3

Question 1

Homologous chromosome

Answer 1

A chromosome pair with the same genes within the same cell

Question 2

If a cell has 8 chromosomes, each daughter cell after mitosis will have how many chromosomes?

Answer 2

8

Question 3

What takes place during interphase of the cell cycle?

Answer 3

DNA replication
Cell growth
Gene expression

Question 4

What is the correct order of the stages of mitosis?

Answer 4

prophase > prometaphase > metaphase > anaphase > telophase

Question 5

During cell division, polar microtubules separate chromatids by…

Answer 5

pushing against each other making the spindle longer

Question 6

During cytokinesis in plant cells…

Answer 6

microtubules assemble a cell plate

Question 7

What increases genetic diversity during sexual reproduction?

Answer 7

Mutation
Independent assortment
Crossing over
Reproduction from 2 parents

Question 8

Chromosome pairs do crossing over during

Answer 8

meiotic prophase 1

Question 9

Diploid cells of chimpanzees have 48 chromosomes. After meiosis I these cells have ___ chromosomes. After meiosis II have ___ chromosomes.

Answer 9

24 and 24

Question 10

Which of the following is TRUE for both mitosis and meiosis II?

Answer 10

sister chromatids separate

Question 11

Which cells can do meiosis in animals?

Answer 11

germ line cells and diploid cells

Question 12

allele

Answer 12

the different versions of a gene found in populations

Question 13

The starting generation of a series of crosses is called

Answer 13

P generation

Question 14

In humans, the autosomal gene allowing us to see the color blue (B) is dominant over a different version of the same gene (b) which causes us to be color blind for this color. A person with normal vision will have the genotype

Answer 14

BB or Bb

Question 15

Pp X pp phenotypic ratio

Answer 15

1 : 1

Question 16

Aa X Aa

Answer 16

1 AA: 2Aa : 1aa genotype
3 : 1 phenotype

Question 17

BbSs X BbSs phenotypic ratio

Answer 17

9 : 3 : 3 : 1

Question 18

The somatic cells of a human male…

Answer 18

contain 44 autosomes
contain an X and a Y chromosome

Question 19

Non-disjunction leads to

Answer 19

Turner syndrome
XO and XXY
trisomy 21
Klinefelter syndrome

Question 20

The sex chromosome composition of a person with Turner syndrome

Answer 20

XO

Question 21

Does the chromosome number change after meiosis 1 and 2

Answer 21

No

Question 22

meiosis 1 and prophase 1

Answer 22

crossing over occurs

Question 23

Chromosome number is reduced by how much in meiosis 1

Answer 23

by 1/2

Question 24

metaphase

Answer 24

chromosomes are lined up

Question 25

mitotic metaphase and metaphase 2

Answer 25

chromosomes line up in a single file line

Question 26

mitotic anaphase and anaphase 2

Answer 26

sister chromatids separate

Question 27

anaphase 1

Answer 27

homologous chromosomes separate

Question 28

Humans have _ chromosomes, are organized into _ pairs…_ pairs of autosomes and _ pairs of sex chromosomes

Answer 28

46 + 23 22 + 1

Question 29

Binary fission

Answer 29

Takes place in the nucleoid 1 cell divides into 2 daughter cells

Question 30

haploid cells made in meiosis

Answer 30

sperm and eggs

Question 31

homologous pairs separate during first round of cell division

Answer 31

meiosis 1

Question 32

sister chromatids separate during second round

Answer 32

meiosis 2

Question 33

synaptonemal complex

Answer 33

holds homologues together

Question 34

what cross would produce an offspring with reduced fertility?

Answer 34

diploid x tetraploid

Question 35

Trisomy

Answer 35

extra chromosome